Witness vs Gravechill Killer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Witness	The Sacred Order	Magic	Support	Rare	Resist 30 Place: Crypts
Gravechill Killer	Undead Hordes	Magic	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Witness	60	6	14865	1134	903	103	15	50	30	0
Gravechill Killer	60	6	13545 -1320	1233 +99	892 -11	96 -7	15	50	30	10 +10

Witness	Long Shot Formula: 3.4ATK Formula: 3.4ATK Attacks 1 enemy. Has a 15% chance of placing an extra hit.	Support Fire Formula: 4.3*ATK Attacks 1 enemy. Places a 30% [Increase DEF] buff on the ally with the lowest HP for 3 turns. Cooldown: 4 Increase DEF 30%	Prayer of Comfort Places a [Block Debuffs] buff on all allies for 1 turn. Places a [Shield] buff equal to 30% of this Champion's MAX HP on all allies for 2 turns. Cooldown: 6 Shield Block Debuffs
Gravechill Killer	Freezing Toxin Formula: 3.9*ATK Attacks 1 enemy. Has a 40% chance of placing a 5% [Poison] debuff for 1 turn. Poison 5%	Blood Chill Formula: 6.8*ATK Attacks 1 enemy. Has a 75% chance of placing a 30% [Decrease DEF] debuff for 2 turns. Has a 75% chance of placing a 60% [Decrease DEF] debuff instead if the target is under a [Poison] debuff. Cooldown: 4 Decrease DEF 60% Decrease DEF 30%	Icy Veins Formula: 2.65*ATK Attacks 1 enemy 2 times.Each hit places a 2.5% [Poison] debuff for 2 turns. Places a 5% [Poison] debuff instead if the target is under a [Poison Sensitivity] debuff. Cooldown: 5 Poison 2.5% Poison 5%