Raging Blast 1 if a certain custom set-up would work without abusing ki blasts in order to insanely extend combos. Hell, even Bleach Blade Battlers 2nd has a lot of depth to it which is ruined by some strong transformations and Aizen being able to do easy tod's. We'll never see the light of the day when an arena fighter has enough depth and balance that it'd work as an offline competitive game, unfortunately.