fusing epics and legendaries

So i just watched Blossom's new video about rq65s and I thought if it was my game how would i fix it and the conclusion was that i think they should make entire new fuse system for epics and legendaries

so how would it work basically is that rq 65 to rq67 would need 2 ultras and one super ti fuse

rq 80 to 82, same story two epics and one ultra

i know my solution isnt perfect and i would be happy to hear what would you do to fix the imbalance in the game