@MasqueTLDF You know there's a button or whatever that allows you to edit your comments. No need to multi-post.
That aside, it's pretty dope. I thought it would just be the main series alone, but DX and EX makes mention of Boosted Gear's Boosts doing doublings.
Also looking at the boosts, they're actually still within the range of Tier 6 and 5 which is nice, with DxD's most high end feats like AxA's incomplete manifestation POWER form being able to planet bust (which should be kept in mind that everyone at that point, which was Shin 3?, were kinda shocked greatly on). So even at these levels, it fits pretty well and is consistent with other stuff like the world-destroying statements Ishibumi has spoken of the Top ranked Longinus's to the upper ranks of DxD's Top 10 strong beings in the world among other things. Plus we got stuff like Serafall's "destroy Japan to magi glitter several times over" to I believe Ddraig saying something about him and Albion able to shatter the world with brute force several times over. Normally those would be taken hyperbolic and all but with the boosts in account, plus the fact I think Ajuka can make continent-wide scale Rating Game dimensions (if you put aside the stars thing) and something about Azi Dahaka being able to destroy all of Europe + being Heaven Dragon Class, that could lead to some credence to those statements in some extent or more.
If not, they're just food for thought.
Don't forget Vali to an extent. He may not be able to Boost his stats like Issei since he didn't do an Issei (i.e take a piece of BG as Issei took a piece of DD), but he can indefinitely keep on nerfing/weakening his opponent's powers over and over while taking any of the halved power he shaved off atop his own, meaning he can stay fighting at his peak power while his opponent keeps on getting weaker and weaker owo.