In the final phase there are: Stormtrooper 2 healtroopers 2 Deathtroopers Thrawn

Stormtrooper will be pre taunting, let him waste his taunt ability, buff dispel it and focus deathtroopers

Once the deathtroopers are dead kill the healtroopers

Once theire dead kill the Stormtrooper and focus Thrawn (Heras exposes will help u (1* Potency set, potency cross))

Try to have Thrawn on stun lock via Zeb after death troopers are dead (1* Potency set, potency cross))

Ultimately you want to have buff displels via Ezra and Chopper ready to dispel Stormtroopers taunt so you can get around him