So it seems people still doubt that Vex sims can be used because of being referred to as simulations, so I guess I should post this large comment by
GalaxianAegis to establish that the word simulation should not disqualify them from such tierings:
"So the continued assertions that I believe I see which are still causing problems with the Vex and their spaces revolve around some of them being "simulations". I know this is the term used by several of the in-game sources, but equating these structures to not being "real" or physical is incorrect given evidence presented here as well as new evidence I have to bring to the table.
Basically, Vex simulations are real, physical copies of things that are perfectly made within their spaces. I'll first call upon evidence that's already been presented here in this thread.
In the OP, it was shown that a Vex was capable of simulating multiple copies of some researchers at the Ishtar Collective. These simulations weren't just non-physical copies though. The researchers that were real clearly pulled them out of the simulation and were given other physical matter like notebooks and such before they were transmitted back into the Vex Gate system to explore more of time and space. Regular simulations would be unable to leave the virtual space where they exist, and this isn't the only example of Vex projections being able to do so.
During the Tree of Probabilities strike, it is directly stated that the Cabal in the simulation are a very real threat and that if they were able to get the information from the map outside the Forest it would cause huge problems for reality. While it's not in the Vex's best intentions for their simulations to escape their spaces, there's multiple instances described here where it is possible. Again, a traditional simulation wouldn't be able to leave the virtual space in which it was created yet Vex projections can.
During the A Garden World Strike, Sagira makes a statement that she took over our Ghost's shell to help us save all of time and space. This implies that Panoptes really was a threat to all of spacetime. A conventional simulation wouldn't be able to pose this kind of threat to the verse.
Furthermore, it's stated multiple times that the enemies in the Infinite Forest are real enough to kill us. There's even a point where our Guardian gets their memories erased by Panoptes during the course of the Curse of Osiris main campaign. Thus, these entities are capable of interacting with real physical matter even to the point that they hax the PC Guardian who is insanely powerful. Traditional simulations can't interact with real matter in any way like these can.
Finally for the simulation case, we have the instance of Quria simulating a previous version of Oryx. Not only was this simulation created inside of the Hive Ascendant Plane, which is pretty much the absolute worst place for the Vex because of how different it is from their spaces, but Quria was able to project this version into reality. This projection had sentience though, it asked Oryx who he was and even questioned about his sisters when it knew of their existence.
Going back to Osiris, in his comic remember that he is scared that the Vex will eventually learn how to simulate the Light and create Guardians.
Now even outside of their simulations, the Vex still present some very real control over space and time in Destiny.
It's stated by Ikora that time itself is home to the Vex.
https://www.ishtar-collective.net/cards/the-undying-mind-2
The Heart of the Black Garden is an entity powerful enough to have a direct effect on the Traveller and its recovery. Secondly, the Vault of Glass is said to hold the power that the Progeny was trying to bring into our world.
https://www.ishtar-collective.net/cards/the-black-garden?highlight=black+garde
The Black Garden isn't a space that should exist in our world. After the Black Heart was destroyed, they are constantly trying to get the Black Garden back to being sealed. The Guardians seek to avoid this outcome.
Source:
https://www.ishtar-collective.net/cards/the-undying-mind?highlight=black+garde
The Black Garden has endless channels with its landscape controlled by the Vex.
Source:
https://www.ishtar-collective.net/cards/pantheon?highlight=black+garde
The Black Garden grows tomorrow and yesterday across time. Also flowers that bloom there are known to stay bloomed forever.
Source:
https://www.ishtar-collective.net/cards/legend-the-black-garden?highlight=black+garde
Gate Lords are powerful Vex Minds that are responsible for keeping certain realms locked outside of time.
Source:
https://www.ishtar-collective.net/transcripts/eye-of-a-gate-lord?highlight=black+garde
Time is relative to the Vex due to their nature. As soon as a powerful Mind is destroyed, a Restorative Mind is deployed that build a bridge through time to restore the Vex. Because of this, while a powerful Mind may be destroyed, it is only ever temporarily.
Source:
https://www.ishtar-collective.net/cards/echo-chamber?highlight=Nexus
The Restoring Mind has the ability to undo any other Mind's "undoing" or death. It also puts into question why Humanity hasn't been wiped out by the Vex, but that's something that is disputed even in verse.
Source:
https://www.ishtar-collective.net/cards/theosyion-the-restorative-mind?highlight=Nexus
The Restorative Mind is a huge threat because it can resurrect Vex Minds that have previously been defeated. Destroying the Restorative Mind also seems to have a huge impact across time as its actions are undone causing other Vex Minds to perish. The causality implications of this are massive for the future and past events.
Source:
https://www.ishtar-collective.net/transcripts/echo-chamber?highlight=Nexus
Atheon is a being described as managing all of the Vex confluxes. He also is a being that transcends causality and is the center of all these lines of causality from across space-time. The Vex seek to also become a fundamental law of the universe so they can never be removed.
Souce:
https://www.ishtar-collective.net/cards/atheon-times-conflux?highlight=atheon+
All of time moves through the needle in the Vault of Glass known as Atheon.
Source:
https://www.ishtar-collective.net/cards/vault-of-glass?highlight=vault+of+glass
Vex technology disrupts the normal flow of time itself. Gaurdians have become lost in the Vault, and thus lost in time due to these effects.
Source:
https://www.ishtar-collective.net/transcripts/paradox-daily?highlight=vault+of+glass
Gorgons in the Vault of Glass have the ability to instantly delete Gaurdians they find within.
Source:
https://www.ishtar-collective.net/cards/the-gorgons?highlight=vault+of+glass
Those who delve into the Vault of Glass are said to have seen time torn asunder.
Source:
https://www.ishtar-collective.net/cards/precursors?highlight=vault+of+glass
Vex from the Vault of Glass are so powerful, that they exist in the future already:
Source:
https://www.ishtar-collective.net/cards/descendants?highlight=vault+of+glass
Skolas, the Kell of Kells from the House of Wolves questline, uses technology from the Vault of Glass to transport his House of Wolves subordinates through time and space to be used in his final battle.
Source:
https://www.ishtar-collective.net/transcripts/queens-ransom
Fundamentally, it would be impossible for all of these spaces to be mere conventional simulations. The "simulations" that the Vex make are not limited to the space they are created. They can come outside of the simulation and even interact with other real matter as shown in the case with Maya Sundaresh and her copies. They can even make these simulations on the fly as shown with Quria who was capable of making a simulation in Oryx's throne world. The simulations for all intents and purposes are stated redundantly to be real and capable of killing our Guardian. During one point of the Curse of Osiris campaign, Panoptes even erases our Guardian's memories. Osiris even believes that they would eventually be able to simulate Guardians and the Light. All of this information contextually creates the condition that the Vex aren't making conventional, non-physical simulations. They are making copies of something that exists in the physical world as perfectly as possible. This goes for their actual simulations of timelines in the Infinite Forest as well.
Secondly, the Vex are explicitly shown to have impacts with their power which are specifically not simulations. Specifically, it's stated that time itself is like a home to the Vex. In the Vault of Glass, Atheon is said the be the convergent point upon which all timelines bulk. The Vault specifically contains multiple timelines, and we know these exist due to multiple pieces of evidence. Skolas uses the Vault of Glass technology to bring his House of Wolves from across time to face The Guardian, and they are not simulations for reference. The Vault of Glass raid, statements from Osiris, and the Ascendant and Descendant Vex being from different timelines. The Gorgons who erase Guardians in the Vault of Glass also erase them from the memories of most who knew them on the outside. They have real realms like the Black Garden which exist outside of normal time and space where time flows freely in both directions. Destroying the Restorative Mind has real consequences for the causality across the universe as well.
The Vex truly and honestly have the full ability to manifest entire timelines as well as affect the timeline of the physical universe. They cannot be discounted as simulations because they accomplish feats which are impossible for traditional simulations. It is best to think of the Vex materialization of matter as copies, not something intangible. "
There are also a few things I would like to call special attention to.
- Firstly, earlier on it was said that Vex stuff being real would imply their resources are infinite, so they can't be real. The issue is, this isn't really a contradiction. Vex win by attrition all the time. They killed Saint-14 over a period of centuries, cause for all his power even he can't leave the Infinite Forest alone, they stalemated Oryx's kids for a hundred years, Cabal reports tell on how they can't hope to win war against the Vex due to them always just warping back, and Osiris straight up says that they'd never die and would have to be fought for longer than forever. Them having infinite resources isn't contradicted by anything, seeing as anything short of Oryx, the Player Character, and the Light and Darkness itself they are able to eventually understand, simulate, and overcome.
- Skolas was mentioned in Ace's comment, but I'd like to elaborate on this further. Skolas is a Fallen Kell. He is not a Vex, he isn't Osiris who is within a Vex simulation, and he isn't Oryx/Savathun messing around with the one Vex Mind to understand the Sword Logic. Skolas is using Vex tech to pull his house through different points in time and space to him, amassing an undying army that will let him unify his race and take back the traveler. He wants this army for things that are blatantly not within Vex simulations, and is using regular Vex tech for this goal. This would be impossible to achieve if Vex sims were purely unreality. If they're real enough for Skolas to be able to pull real people out of them and into reality, they should be real enough to count for AP.
- Crota is messing around with his sword and cuts a wound into Vex space. He and his sisters then get stalemated by the Vex for 100 years: They're far too powerful in their own domains, but Quria's usage of the Sword Logic can stop them from annihilating the Vex and they lose too much power when they go into Vex space and are forced to retreat. That Crota can just cut into their area like this would support Vex worlds existing on a similar level to Hive ones, as it doesn't really make much sense that he could cut into a space that doesn't really exist and somehow still get stalemated by the inhabitants of that space.