Metalshaper vs Pain Keeper

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Metalshaper	Lizardmen	Spirit	Support	Rare	Defence 15% Place: Crypts
Pain Keeper	Dark Elves	Void	HP	Rare	HP 21% Place: Crypts

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Metalshaper	60	6	16350	859	1079	90	15	57	30	0
Pain Keeper	60	6	19320 +2970	969 +110	771 -308	102 +12	15	50 -7	40 +10	0

Metalshaper	Transference Bolt Formula: 4*DEF Attacks 1 enemy. Has a 30% chance of stealing 1 random buff from the target.	Fortified Steel Places a [Shield] buff on all allies for 2 turns. The value of the [Shield] is proportional to this Champion Level. Cooldown: 3 Shield	Rescue Formula: 0.2*HP Removes all debuffs from the ally with the lowest HP, then heals them by 20% of this Champion's MAX HP. Also places a 25% [Increase DEF] buff on that ally for 3 turns. Cooldown: 5 Increase DEF 30%
Pain Keeper	Unflagging Advance Formula: DEF+ATK Formula: 0.1*MAX_STAMINA Attacks 1 enemy 2 times. Fills this Champion's Turn Meter by 10%.	Spectacular Sweep Formula: 0.12HP+2ATK Formula: 0.15*HP Attacks all enemies, then heals all allies by 15% of this Champion's MAX HP. Cooldown: 5	Combat Tactics Decreases the cooldowns of all ally skills by 1 turn. This skill can have its cooldown reduced by other skills that reduce cooldowns by 1 turn. Cooldown: 7