Assassin vs Executioner vs Headsman

Overall comparison

HERO	Fraction	Element	Type	Rarity	Aura
Assassin	Shadowkin	Magic	Attack	Rare	Speed 10% Place: All battles
Executioner	Knight Revenant	Magic	Defence	Rare	Defence 17% Place: All battles
Headsman	The Sacred Order	Spirit	Attack	Rare	-

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST	ACC
Assassin	60	6	13380	1365	771	89	15	50	30	10
Executioner	60	6	14865 +1485	782 -583	1255 +484	89	15	50	40 +10	0 -10
Headsman	60	6	10740 -4125	1354 +572	958 -297	100 +11	15	57 +7	30 -10	0

Assassin	King's End Formula: 3.3*ATK Attacks 1 enemy. Has a 50% chance of placing a 5% [Poison] debuff for 1 turn. Poison 5%	Lingering Death Formula: 5.9*ATK Attacks 1 enemy. Has a 50% chance of increasing the duration of all debuffs on the enemy by 1 turn. Cooldown: 4	Draught of Sleep Formula: 5.4*ATK Attacks 1 enemy. Has a 75% chance of placing a 15% [Weaken] debuff for 2 turns. Cooldown: 5 Weaken 15%
Executioner	Shield Bash Formula: 5*ATK Attacks 1 enemy. Has a 15% chance of placing a [Stun] debuff for 1 turn. Stun	Tumult Formula: 2ATK+2.4DEF Formula: 0.2*MAX_STAMINA Attacks all enemies. Decreases the Turn Meter by 20%. Has a 50% chance of placing a 15% [Decrease SPD] debuff for 2 turns. Cooldown: 4 Decrease SPD 15%	Schiltron Places a 60% [Increase DEF] buff and a [Counterattack] buff on this Champion for 3 turns. Cooldown: 7 Counterattack Increase DEF 60%
Headsman	Public Execution Formula: 1.57*ATK Attacks 1 enemy 2 times. Each hit has a 10% chance of placing a [Fear] debuff for 1 turn. Fear	Headman's Due Formula: 3.7*ATK Attacks all enemies. Has a 30% chance of placing a 100% [Heal Reduction] debuff for 2 turns. Cooldown: 3 Heal Reduction 100%	Judged Guilty [P] Formula: 0.15*DMG_MUL Inflicts 15% more damage to targets under [Heal Reduction] debuffs.