Sergeant vs Executioner vs Headsman

Overall comparison

HERO	Fraction	Element	Type	Rarity
Sergeant	The Sacred Order	Force	Attack	Uncommon
Executioner	Knight Revenant	Magic	Defence	Rare
Headsman	The Sacred Order	Spirit	Attack	Rare

HERO	LVL	STARS	HP	ATK	DEF	SPD	C.RATE	C.DMG	RESIST
Sergeant	60	6	12555	1112	804	92	15	50	30
Executioner	60	6	14865 +2310	782 -330	1255 +451	89 -3	15	50	40 +10
Headsman	60	6	10740 -4125	1354 +572	958 -297	100 +11	15	57 +7	30 -10

Sergeant	Hack Formula: 2.3*ATK Attacks 1 enemy 2 times.	Rally Attacks 1 enemy with 1 random ally. The ally joining the attack use their default skill. Cooldown: 3	-
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.