Mistress of Hymns vs Belletar Mage-slayer

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Mistress of Hymns	The Sacred Order	Spirit	Support	Epic	Defence 25% Place: All battles
Belletar Mage-slayer	Ogryn Tribes	Void	HP	Legendary	HP 33% Place: All battles

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Mistress of Hymns	60	6	18990	1024	1013	103	15	50	30	0
Belletar Mage-slayer	60	6	21975 +2985	848 -176	1266 +253	108 +5	15	50	50 +20	0

Skills comparison

Mistress of Hymns	Bolstering Blow Formula: 4ATK Formula: 0.15DEALT_DMG Attacks 1 enemy. Heals the ally with the lowest HP by 15% of the damage inflicted.	Song of Triumph Formula: 5.7*ATK Attacks 1 enemy. Places a 15% [Continuous Heal] buff on the 2 allies with the lowest HP for 2 turns if this attack is critical. Cooldown: 4 Continuous Heal 15%	Hymn of Rebirth Formula: 0.5*TRG_HP Revives 2 random allies with 50% HP and places a [Veil] buff on them for 1 turn. Cooldown: 6 Veil	-
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.