Protector start;
+ Haniya (passive 35% chance to upgrade a die by 3)
+ Alice (Passive 1d4 every point of mana at the start of turn (which is 3 with upgrade guaranteed)
+ Himari (Passive 3d4 whenever 5 dice are rolled)
=> Use hero passive for random die upgrades => get 3x d4 from Alice and get 3x d4 from Himari whenever you roll your own hero ability for 1 mana once (as it rolls 6 dice).
This makes you Start every fight with almost enough damage to kill from passives only. You also get 3-400 damage with 3 mana used at the end sometimes. Literally one turn any fight the entire way through. And if you don't you get a ton of shield + heals as well so you can literally never die.
Edit: I just got 336 damage from passives alone. Went up to 542 with characters rolls. Overkilled everything in half a turn from start to finish Because hero ability went into the d4 at the start.