Senna Amberheart vs Niamhe, Spear of Nyresa

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Senna Amberheart	Dwarves	Void	Support	Legendary	Speed 19% Place: All battles
Niamhe, Spear of Nyresa	Sylvan Watchers	Void	Defence	Legendary	Defence 35% Place: All battles

Stats comparison

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Senna Amberheart	60	6	18990	1112	1200	113	15	50	40	0
Niamhe, Spear of Nyresa	60	6	18990	782 -330	1531 +331	98 -15	15	50	50 +10	0

Skills comparison

Senna Amberheart	Amberthrust Formula: 4.3*ATK Attacks 1 enemy. Has a 50% chance to instantly activate a [Continuous Heal] buff on each ally.	Touch of Gold Formula: 0.2*MAX_STAMINA Places a 30% [Increase SPD] buff and two 15% [Continuous Heal] buffs on all allies for 2 turns. Also fills the Turn Meters of all allies by 20%. Cooldown: 5 Continuous Heal 15% Increase SPD 30%	Edge of Death Formula: 0.5TRG_HP Formula: 0.5MAX_STAMINA Revives all dead allies with 50% HP and 50% Turn Meter. Then, teams up with all allies revived by this skill to attack the enemy with the lowest HP. The allies joining the attack will use their default skills. Cooldown: 6	Healing Glow [P] Formula: 0.05*MAX_STAMINA Whenever a [Continuous Heal] buff activates on any ally, fills the Turn Meters of all allies by 5%. At the end of this Champion’s turn, increases the duration of a [Continuous Heal] buff on a random ally except this Champion for 1 turn.
Niamhe, Spear of Nyresa	Woodspear Formula: 4.1*DEF Attacks 1 enemy. Places a 50% [Decrease ATK] debuff and a 30% [Decrease C. RATE] debuff on the target for 2 turns. Has a 50% chance that these debuffs cannot be resisted or blocked. Decrease C. RATE Decrease ATK 50%	Cerulean Guard Formula: 5.4DEF Formula: 5.4DEF Attacks 1 enemy. If the target has 50% HP or less, this attack is always critical and will ignore 50% of the target’s DEF. Places a [Shield] buff on all allies for 2 turns. The value of the [Shield] is equal to the difference between the target's current HP and the target's MAX HP. If target is a Boss, the value of the [Shield] is proportional to this Champion’s DEF instead. If the target is killed, also reduces the cooldowns of all ally skills by 2 turns. Cooldown: 5 Shield	Jeweled Leaf Formula: 4*DEF Heals all allies. The value of the heal is proportional to this Champion’s DEF. Also places a [Block Debuffs] buff and a 50% [Ally Protection] buff on all allies for 2 turns. Cooldown: 4 Block Debuffs Ally Protection 50%	Shield-Mistress [P] Places a [Block Damage] buff on all allies for 1 turn at the start of the Round, and each time this Champion’s HP drops below 50%. If there are multiple Champions on the team with this skill, only one will activate. This skill will not activate on duplicate copies of this Champion, if this particular Champion is dead. Block Damage