I'd like to give my input on the Gilgamesh fight. Great concept, and a good start, but work needs to be done to make it polished and more enjoyable.
I feel the idea of a character whom our group of powerful haxors and heavy hitters could not simply sweep away into the trash was a great idea. I feel the darkness almost using the avatar of Gilgamesh as a puppet was really cool as well. I do believe execution needs a lot of work. I feel like you should enforce the rules that Dargoo had suggested in the next thread, it'll take a lot of stress of of you when it comes to replying and setting up plot, and it makes the threads less cluttered in general.
The defeat of Gilgamesh seemed... underwhelming. In the end, it took our fastest character to tell another portal creator the coordinates to a blackhole, just for him to die. Everyone else was useless, period. And while that is a consequence of a hax group vs an anti-hax character, I think next time this many hax nullifications were too much for anyone to really be useful, such a character should be reserved in the ultra-end game, maybe just mild to severe resistances next time. These boss fights should be a team-jointed effort, and that doesn't mean putting us against a character and hope for the best when it comes to teamwork, it means having the character interact with us and putting specific people into specific situations, addressing the majority by addressing a couple of people at a time, and ultimately having their actions on any specific person pose consequences for the entire group, thus giving people a reason to work together.
Multiple enemies could also give you more variety and abilities to work with. I'm sure you can think up a couple synergies that would really compliment each other, only drawback to this is that it can get twice as confusing, but that's why I reccomended Dragoo's idea of how to organize character chat. Having a character have abilities not listed on their profile is fine as well, the darkness is an abstract power that we have no idea how it functions, it's not out of the ordinary for it to grant an entity under its control temporary unique abilities that seperate it from the original, for example, maybe a shadow-corrupted charizard that has hellfire, or maybe a shadow-corrupted link with the ability to teleport. you can get even more creative than this, having unique shadow abilities that compliment and strengthen the original character because of it, like potentially giving a shadow-corrupted yang invulnerability (as well as other resistances thanks to being a shadow) allowing her semblance to get stronger from getting hit without her actually suffering permanent damage. basically, you have a lot of free-reign to give a character additional resistances to hax and unique abilities without any question whatsoever. just be sure to have a way to defeat these potentially OP characters with the help of plot, not just relying on us to kill them through abilities, in case you go overboard like Gilgamesh you haven't wrote yourself into a corner and need to kill him off.
Overall you've got some good ideas, just gotta execute them better. I'd rate the previous fights we've had so far maybe averaging a 4-5/10, this Gilgamesh fight was around a 6/10 in terms of overall how well it's been done. We've been expected to forward the plot and the fights ourselves a lot, it really makes it uninteresitng very quickly, ive wanted to quit a couple times now because of how boring and unmoderated this has been, but thanks to some creative input and overall control from yourself this Gilgamesh fight was better than the previous, but still has a lot of room to grow.