Mithrala Lifebane vs Rian the Conjurer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Mithrala Lifebane	Dark Elves	Void	Support	Legendary	Accuracy 80 Place: All battles
Rian the Conjurer	Dark Elves	Force	Support	Epic	Accuracy 40 Place: All battles

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Mithrala Lifebane	60	6	20310	870	1354	109	15	50	30	10
Rian the Conjurer	60	6	17010 -3300	1002 +132	1167 -187	98 -11	15	50	30	15 +5

Skills comparison

Mithrala Lifebane	Libation of Pain Formula: 2*DEF Attacks 2 times at random. Each hit has an 80% chance of placing a 5% [Poison] debuff for 2 turns. Poison 5%	Sigil of Toxic Glory Formula: 4*DEF Attacks all enemies. Places a [Hex] debuff for 2 turns. Also places a 60% [Increase DEF] buff and a 50% [Increase ATK] buff on all allies for 2 turns. Cooldown: 5 Increase ATK 50% Increase DEF 60% Hex	Brimming Cylix Removes all debuffs from all allies, then places a 25% [Strengthen] buff and a [Shield] buff equal to 30% of this Champion’s MAX HP on all allies for 2 turns. Cooldown: 5 Shield Strengthen	Gaze of Stone [P] Formula: 1*ACC Whenever this Champion is attacked by an enemy under a [Hex] debuff, has a 50% chance of applying a [Petrification] debuff on the attacker for 1 turn. Whenever an ally is attacked by an enemy under a [Hex] debuff, has a 30% chance of applying a [Petrification] debuff on the attacker for 1 turn. Also increases this Champion’s RES. The amount by which it is increased is equal to the amount of ACC this Champion has. Petrification
Rian the Conjurer	Magma Ball Formula: 4.6*ATK Attacks 1 enemy. Has a 50% chance of placing a [Block Buffs] debuff for 2 turns. Block Buffs	Sweeping Dismissal Has a 75% chance of removing all buffs from all enemies. Also has a 75% chance of placing a 25% [Weaken] debuff on all enemies for 2 turns. Cooldown: 4 Weaken 25%	Master of Summons Formula: (skillTargetId==targetId)0.5TRG_HP+(skillTargetId!=targetId)0.3TRG_HP Formula: (skillTargetId==targetId)0.5MAX_STAMINA+(skillTargetId!=targetId)0.3MAX_STAMINA Revives a dead ally with 50% HP, then fills their Turn Meter by 50%. Will then also place a [Block Debuffs] buff on them for 2 turns. Will also revive Akoth the Seared and Urost the Soulcage with 30% HP if they are on the same team and not the target of the skill. Will then also fill their Turn Meters by 30% after reviving. If either Akoth the Seared or Urost the Soulcage are the target of the skill, that Champion will be revived with 50% HP and 50% Turn Meter, and a [Block Debuffs] buff for 2 turns. Cooldown: 6 Block Debuffs	-