sort_vizier_candidates_to_list_effect

sort_vizier_candidates_to_list_effect = {
	scope:actor = {
		every_courtier = {
			limit = { is_valid_basic_candidate_for_vizier_trigger = yes }
			add_to_list = characters_pre_filter
		}
		every_vassal = {
			limit = {
				is_valid_basic_candidate_for_vizier_trigger = yes
				highest_held_title_tier <= tier_barony
			}
			add_to_list = characters_pre_filter
		}
	}
	hidden_effect = {
		while = {
			count = 6
			ordered_in_list = {
				list = characters_pre_filter
				order_by = diarchy_vizier_succession_score_value
				limit = {
					NOT = { is_in_list = characters }
				}
				add_to_list = characters
			}
		}
	}
}

As written in game/common/scripted_effects/00_diarchy_scripted_effects.txt.