Rakka Viletide vs Belletar Mage-slayer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Rakka Viletide	Orcs	Void	Support	Legendary	Speed 19% Place: All battles
Belletar Mage-slayer	Ogryn Tribes	Void	HP	Legendary	HP 33% Place: All battles

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Rakka Viletide	60	6	19650	1134	1134	109	15	50	40	0
Belletar Mage-slayer	60	6	21975 +2325	848 -286	1266 +132	108 -1	15	50	50 +10	0

Rakka Viletide	Oozing Blessing Removes all debuffs from all allies, then places a 50% [Increase ATK] buff and a [Shield] buff equal to 25% of this Champion’s MAX HP on all allies for 2 turns. Cooldown: 4 Shield Increase ATK 50%	-	-	-
Belletar Mage-slayer	Fume Ax Formula: 0.22*HP Attacks 1 enemy. Has a 75% chance of decreasing the cooldown of a random skill of the ally with the highest Turn Meter, except this Champion, by 1 turn.	Slayer's Roar Formula: 0.22HP Formula: 0.2HP Formula: 0.2*MAX_STAMINA Attacks all enemies. Places a 50% [Increase ATK] buff and a 60% [Increase DEF] buff on all allies for 2 turns. Also heals all allies by 20% of this Champion's MAX HP and fills all allies' Turn Meters by 20%. Cooldown: 4 Increase ATK 50% Increase DEF 60%	Mercy of the Oasis Formula: 0.5TRG_HP Formula: 0.5MAX_STAMINA Revives all dead allies with 50% HP and 50% Turn Meter, then places a [Shield] buff on all revived allies for 2 turns, equal to 20% of this Champion's MAX HP. Also places a [Block Debuffs] buff on all allies for 2 turns. Cooldown: 6 Shield Block Debuffs	Critical Juncture [P] Has a 75% chance of decreasing all of an ally's skill cooldowns by 1 turn whenever they are revived. Once per turn, if an ally is killed, reduces the cooldowns of all this Champion's skills by 1 turn.