yea im close to 30 days, about 5 more days and i'll have High Khatun. and Ninja has been pretty solid, I think I just need to give him some better gear. Thanks for the tip!
just avoid red (force) teams as you are basically all blue. HK is just for aura and TM boost.
HK (lead) should be fastest
Armina (AOE def down)
Athel (nuke)
Ninja (cleanup/freeze)
Kaiden is also quite good in Arena, with both an AoE dec attack and a double revive. You can build him to go right after High Khatun, and as a defensive champ, you can just get on a good Def % main stat chest and he'll hit pretty hard.
So I might run:
Turn Meter boosting Speed Lead (High Khatun)
AoE Champ 1 (Kaiden)
AoE Champ 2 (Armina)
Nuker (Athel) -> Get that crit to 85% and crit damage as high as possible (her AoE has a 15% bonus to crit rate)
Good Luck!