Mistress of Hymns vs Oella

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Mistress of Hymns	The Sacred Order	Spirit	Support	Epic	Defence 25% Place: All battles
Oella	Sylvan Watchers	Magic	Support	Legendary	Resist 75 Place: Dungeons

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
Oella	60	6	21135 +2145	980 -44	1189 +176	110 +7	15	50	50 +20	0

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	-
Oella	Flutter Fluster Formula: 4.5*ATK Attacks 1 enemy. Has a 80% chance of placing a 30% [Decrease SPD] debuff for 2 turns. This debuff cannot be resisted if Ultan of the Shell is on the same team. Decrease SPD 30%	Hand of Spring Formula: 0.3*TRG_HP Heals all allies by 30% of their MAX HP. Increases the duration of all ally buffs by 1 turn. Cooldown: 4	Morphosis Formula: 0.3*MAX_STAMINA Fills the Turn Meters of all allies by 30%. Also places a 50% [Increase RES] buff on all allies for 2 turns. Cooldown: 6 Increase RES	Untrammeled [P] Whenever an ally loses 15% or more of their MAX HP from a single hit, places a 15% [Continuous Heal] buff on that ally for 1 turn. Places a 15% [Continuous Heal] buff for 2 turns on that ally and then instantly activates it if Ultan of the Shell is on the same team. Can occur only once to an ally per turn. Continuous Heal 15%