Altan vs Avir the Alchemage

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Altan	Barbarians	Magic	Defence	Legendary	Defence 33% Place: All battles
Avir the Alchemage	Dwarves	Magic	Support	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Altan	60	6	20145	837	1398	102	15	57	50	0
Avir the Alchemage	60	6	16680 -3465	881 +44	1035 -363	102	15	50 -7	30 -20	10 +10

Altan	Searing Blow Formula: 3.3*DEF Attacks 1 enemy. Has a 60% chance of placing a 50% [Decrease ATK] debuff for 2 turns. Decrease ATK 50%	Wall of Flame Formula: 5.6*DEF Attacks 1 enemy. Places a 60% [Increase DEF] buff on all allies for 2 turns. Places a [Shield] buff on all allies for 2 turns equal to 20% of their MAX HP if this attack kills an enemy. Cooldown: 4 Shield Increase DEF 60%	Fiery Rebirth [P] Formula: 0.3*TRG_HP Revives a random ally with 30% HP every time this Champion kills an enemy. Resets the cooldowns on this Champion's Skills if this Champion kills an enemy and all allies are alive.
Avir the Alchemage	Flask of Vitreol Formula: 4.7*ATK Attacks 1 enemy. Has a 30% chance of placing a 5% [Poison] debuff for 2 turns. Poison 5%	Corroding Catalyst Formula: 4.2*ATK Attacks all enemies. Has a 50% chance of placing a 25% [Decrease ATK] debuff for 2 turns. Also places a 15% [Decrease SPD] debuff for 1 turn on targets under [Poison] debuffs. Cooldown: 4 Decrease ATK 25% Decrease SPD 15%	Vitalizing Potions Formula: 0.15MAX_STAMINA Formula: 0.15HP Fills the Turn Meters of all allies by 15% and heals all allies by 15% of this Champion’s MAX HP. Cooldown: 6