Crypt Witch vs Rearguard Sergeant

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Crypt Witch	Knight Revenant	Magic	Attack	Epic	Speed 20% Place: Crypts
Rearguard Sergeant	Dwarves	Force	Defence	Epic	HP 33% Place: All battles Element: Force

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Crypt Witch	60	6	14865	1421	892	98	15	60	30	0
Rearguard Sergeant	60	6	18495 +3630	859 -562	1211 +319	97 -1	15	50 -10	75 +45	0

Crypt Witch	Fetid Steel Formula: 3.4ATK Formula: DMG_MUL0.3 Attacks 1 enemy. Deals 30% more damage if the target has any buffs. Will ignore [Shield] and [Block Damage] buffs.	Dismantle Formula: 2.2*ATK Formula: -0.15 Attacks 3 times at random. Each hit has a 75% chance of placing a 60% [Decrease DEF] debuff for 2 turns. Each hit will also ignore 15% of the target's DEF. Cooldown: 4 Decrease DEF 60%	Not So Fast Formula: 4.5*ATK Formula: -0.5 Attacks 1 enemy. Will ignore 50% of the target's DEF if this Champion has higher SPD than the target. Cooldown: 4
Rearguard Sergeant	Crushing Impact Formula: 4*DEF Attacks 1 enemy. Has a 40% chance of placing a 60% [Decrease DEF] debuff for 2 turns. Decrease DEF 60%	Flail Master Formula: 3.6DEF Formula: 0.25DEALT_DMG Attacks all enemies. Has a 50% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Heals this Champion by 25% of the damage inflicted. Cooldown: 4 Decrease ATK 50%	Fend Them Off Places a 50% [Ally Protection] buff and a 15% [Continuous Heal] buff on all allies except this Champion for 2 turns. Cooldown: 5 Continuous Heal 15% Ally Protection 50%