What makes a good Horse Archer Captain in CK3?

Employer has Positions Of Power Perk (Friend) +5, Martial Skill Martial × 2.5 (max 60), Prowess Skill Prowess (max 60), Strategist +20 and Has any Commander Trait +10 (the game's aptitude breakdown, patch 1.20.0.3).

What does the Horse Archer Captain give?

Terrible: Archer Cavalry Damage +5%, Archer Cavalry Pursuit +5%; Poor: Archer Cavalry Damage +10%, Archer Cavalry Pursuit +10%; Average: Archer Cavalry Damage +30%, Archer Cavalry Pursuit +30%; Good: Archer Cavalry Damage +40%, Archer Cavalry Pursuit +40%; Excellent: Archer Cavalry Damage +50%, Archer Cavalry Pursuit +50%.

Camp officers (landless adventurers)

Horse Archer Captain

Roads to Power

Horse Archer Captain is a camp officer in Crusader Kings III; its aptitude rests on Martial. At excellent aptitude it gives Archer Cavalry Damage +50%, Archer Cavalry Pursuit +50%. Aptitude also comes from Employer has Positions Of Power Perk (Friend) (+5), Strategist (+20) and Has any Commander Trait (+10). It needs Roads to Power. Patch 1.20.0.3, from game/common/court_positions/types/00_camp_officers.txt.

Quick answers (2)

What makes a good Horse Archer Captain in CK3?: Employer has Positions Of Power Perk (Friend) +5, Martial Skill Martial × 2.5 (max 60), Prowess Skill Prowess (max 60), Strategist +20 and Has any Commander Trait +10 (the game's aptitude breakdown, patch 1.20.0.3).
What does the Horse Archer Captain give?: Terrible: Archer Cavalry Damage +5%, Archer Cavalry Pursuit +5%; Poor: Archer Cavalry Damage +10%, Archer Cavalry Pursuit +10%; Average: Archer Cavalry Damage +30%, Archer Cavalry Pursuit +30%; Good: Archer Cavalry Damage +40%, Archer Cavalry Pursuit +40%; Excellent: Archer Cavalry Damage +50%, Archer Cavalry Pursuit +50%.

The Horse Archer Captain commands the camp's mounted skirmishers. They are responsible for the contingent's leadership, training, and tactics.

What it gives you, by aptitude

The holder's aptitude (see below) sets the level: levels start at 20, 40, 60, 80.

Terriblebelow 20
- Archer Cavalry Damage+5%
- Archer Cavalry Pursuit+5%
Poor20+
- Archer Cavalry Damage+10%
- Archer Cavalry Pursuit+10%
Average40+
- Archer Cavalry Damage+30%
- Archer Cavalry Pursuit+30%
Good60+
- Archer Cavalry Damage+40%
- Archer Cavalry Pursuit+40%
Excellent80+
- Archer Cavalry Damage+50%
- Archer Cavalry Pursuit+50%

What makes a good Horse Archer Captain

The game's own aptitude breakdown for this position — every part it adds up:

Part	Aptitude
Employer has Positions Of Power Perk (Friend)	+5
Martial Skill	Martial × 2.5 (max 60)
Prowess Skill	Prowess (max 60)
Strategist	+20
Has any Commander Trait	+10

The holder gets

Prestige+0.1/month

Who may hire it (valid_position) (10 lines of game script)

custom_tooltip = {
	text = landless_government_tt
	government_has_flag = government_is_landless_adventurer
}
custom_tooltip = {
	text = horse_archer_captain_captain_camp_officer_parameter_tt
	domicile ?= {
		has_domicile_parameter = camp_unlocks_horse_archer_captain_officer
	}
}

As written in game/common/court_positions/types/00_camp_officers.txt.

Who may hold it (valid_character) (3 lines of game script)

valid_camp_officer_trigger = {
	OFFICER = horse_archer_captain
}

As written in game/common/court_positions/types/00_camp_officers.txt.

Shown when (is_shown) (5 lines of game script)

has_ep3_dlc_trigger = yes
custom_tooltip = {
	text = landless_government_tt
	government_has_flag = government_is_landless_adventurer
}

As written in game/common/court_positions/types/00_camp_officers.txt.

Source: game/common/court_positions/types/00_camp_officers.txt, common/court_positions/tasks, common/script_values and the English localisation, Crusader Kings III 1.20.0.3. Salary is the base before the realm-size and cultural-era multipliers.