Wintera

Okay thanks for the help! Here's some screenshots of my medals

Hey guys! I've only been playing Unchained for about a week and a half. I've gotten some good medals (I think), but there's a quest where I need to deal 20,000 damage. I was reading some other posts where people said it shouldn't be too difficult. I was wondering if I'm doing something wrong. I'm using... Three Wishes Keyblade +23 Beauty and the Beast 6* Megara 6* Timeless River Sora 5* and Illustrated Sephiroth 6* Sephiroth is in the ×2.10 slot. He's +1000 strength and has Attack Boost 3 Max I also have a 6* Timeless River Donald that lowers defense, but then the heartless dies before Sephiroth attacks. I don't have any other defense lowering medals. I have plenty of strength buffers, but Beauty and the Beast already increase by 3 tiers. Isn't that the max? I can only do about 18000-19000 damage. Any help would be much appreciated! I can upload screenshots of my other medals if that would help. Update: I ran into the same problem with my speed medals on a different level I used the same set up except Lady Luck Keyblade +23 and Xehanort and Vanitas with 3 guilt and +1000 in the x2.10 slot