Coffin Smasher vs Keeyra the Watcher

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Coffin Smasher	Knight Revenant	Magic	HP	Rare	-
Keeyra the Watcher	Dwarves	Spirit	Defence	Legendary	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Coffin Smasher	60	6	21135	683	936	92	15	50	40	0
Keeyra the Watcher	60	6	19485 -1650	870 +187	1409 +473	104 +12	15	50	50 +10	0

Coffin Smasher	Mallet Crescendo Formula: 0.06*HP Attacks 1 enemy 3 times. Each hit has a 15% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Decrease ATK 50%	Tombfire Formula: 0.22*HP Attacks 1 enemy. Has a 50% chance of placing a [HP Burn] debuff for 2 turns. Cooldown: 4 HP Burn	Gloom Mist [P] Formula: -0.05*DMG_MUL Decreases the damage enemies inflict with AoE attacks by 5%.	-
Keeyra the Watcher	Falling Star Crush Formula: 3.6*DEF Attacks 1 enemy. Has a 50% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Decrease ATK 50%	Smashing Spree Formula: 3.8*DEF Attacks all enemies. Has a 75% chance of decreasing the duration of all enemy buffs by 1 turn. Also has a 75% chance of placing a 50% [Decrease ACC] debuff for 2 turns. Cooldown: 4 Decrease ACC 50%	Coordinated Defense Places a 50% [Ally Protection] buff on all allies except this Champion for 2 turns. Also places a 60% [Increase DEF] buff on all allies for 2 turns. Cooldown: 5 Ally Protection 50% Increase DEF 60%	Besieger's Bane [P] Whenever an ally is attacked while under an [Ally Protection] buff, places a 50% [Decrease ATK] debuff on the attacker for 1 turn. Decrease ATK 50%