Rector Drath vs Kael

Overall comparison

HERO	Fraction	Element	Type	Rarity
Rector Drath	Knight Revenant	Force	Support	Epic
Kael	Dark Elves	Magic	Attack	Rare

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Rector Drath	60	6	17010	1035	1134	109	15	50	30	0
Kael	60	6	13710 -3300	1200 +165	914 -220	103 -6	15	57 +7	30	0

Rector Drath	Scepter of Authority Formula: 4*ATK Attacks 1 enemy. Has a 35% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Decrease ATK 50%	Necro Mutation Formula: 0.2*HP Heals all allies by 20% of this Champion's MAX HP. After healing, places a [Perfect Veil] buff for 2 turns on all allies with full HP. Places a 15% [Continuous Heal] buff for 1 turn instead on all allies with less than 100% HP. Cooldown: 5 Continuous Heal 15% Perfect Veil	Spirit Form Formula: 0.6TRG_HP Formula: 0.6MAX_STAMINA Revives a single ally with 60% HP and fills their Turn Meter by 60%. Places a [Perfect Veil] buff on them for 3 turns. Cooldown: 6 Perfect Veil	Master of Ghosts [P] Formula: 0.1*TRG_HP Formula: 50 Whenever an ally under a [Veil] or [Perfect Veil] buff gets a turn, heals them by 10% of their MAX HP. Also increases the RES of allies under [Veil] or [Perfect Veil] buffs by 50. [Will only increase RES once per ally if there are multiple Rectors on the team.]
Kael	Dark Bolt Formula: (3.5*ATK)+100 Attacks 1 enemy. Has an 80% chance of placing a 2.5% [Poison] debuff for 2 turns. Poison 2.5%	Acid Rain Formula: 4.65ATK Formula: MAX_STAMINA0.25*killedEnemiesCountCurrentTurn Attacks all enemies. Has an extra 15% chance of inflicting a critical hit. Fill the Turn Meter of this Champion by 25% for each enemy killed. Cooldown: 3	Disintegrate Formula: 1.5*ATK Attacks 4 times at random. Has a 40% chance of placing a 5% [Poison] debuff for 2 turns. Cooldown: 5 Poison 5%	-