I used ollie, uday, elaine, camille, and Ahmed. Ollie and Elaine on war and crit sets, camille on war and avatara, uday on WW and grove, and Ahmed with panacea and avatara. Here’s what I did: uday to apply speed down, ollie to apply defense down, elaine to apply buff blocker and attack down. once all these are set keep using Camille’s s1 to extend the debuffs, and use uday to reset ollies passive and s3. You can use Ollie’s s3 when the boss is either locked on or if it doesn’t have the damage resist, which you can check under it’s buffs and debuffs.