several improvements: WIP

code/modules/ai/ai_holder_combat_unseen.dm

@@ -4,7 +4,7 @@
 /datum/ai_holder/proc/engage_unseen_enemy()
 	ai_log("engage_unseen_enemy() : Entering.", AI_LOG_TRACE)
 	// Also handled in strategic updates but handling it here allows for more fine resolution timeouts
-	if((lose_target_time+lose_target_timeout) >= world.time)
+	if((lose_target_time+lose_target_timeout) <= world.time)
 		return remove_target()
 	// Lets do some last things before giving up.
 	if(conserve_ammo || !holder.ICheckRangedAttack(target_last_seen_turf))
@@ -12,7 +12,7 @@
 			// Go to where you last saw the enemy.
 			return give_destination(target_last_seen_turf, 1, TRUE) // Sets stance as well
 		// We last saw them next to us, so do a blind attack on that tile.
-		else if(melee_on_tile(target_last_seen_turf) != ATTACK_SUCCESSFUL && intelligence_level >= AI_NORMAL)
+		else if((melee_on_tile(target_last_seen_turf) != ATTACK_SUCCESSFUL) && (intelligence_level >= AI_NORMAL))
 			var/obj/O = find_escape_route()
 			if(istype(O))
 				return give_destination(get_turf(O), 0, TRUE)

code/modules/ai/ai_holder_subtypes/xeno_alien_ai.dm

@@ -0,0 +1,37 @@
+/*
+/// For Skathari
+/// In its own file to easily expand upon. Mob found in alien.dm 
+*/
+
+/datum/ai_holder/simple_mob/xeno_alien /// Basic
+	hostile = TRUE
+	retaliate = TRUE
+	cooperative = TRUE
+	returns_home = FALSE
+	can_flee = FALSE
+	speak_chance = 0
+	wander = TRUE
+	base_wander_delay = 4
+
+/datum/ai_holder/simple_mob/xeno_alien/post_melee_attack(atom/A)
+	if(holder.Adjacent(A))
+		holder.IMove(get_step(holder, pick(alldirs)))
+		holder.face_atom(A)
+
+/datum/ai_holder/simple_mob/xeno_alien/ranged /// Drones
+	pointblank = TRUE
+	ignore_incapacitated = TRUE /// We're squishier and our tox hits hard. Focus on who's up. 
+	var/run_if_this_close = 4
+	var/max_distance = 6
+
+/datum/ai_holder/simple_mob/xeno_alien/ranged/on_engagement(atom/A)
+	if(get_dist(holder, A) < run_if_this_close)
+		holder.IMove(get_step_away(holder, A, run_if_this_close))
+		holder.face_atom(A)
+	else if(get_dist(holder, A) > max_distance)
+		holder.IMove(get_step_towards(holder, A))
+		holder.face_atom(A)
+
+/datum/ai_holder/simple_mob/xeno_alien/empress /// Big mama
+	ignore_incapacitated = TRUE /// Focus on better threats. 
+	intelligence_level = AI_SMART /// She's got the brains

code/modules/ai/ai_holder_targeting.dm

@@ -4,6 +4,7 @@
 	var/hostile = FALSE						// Do we try to hurt others?
 	var/retaliate = FALSE					// Attacks whatever struck it first. Mobs will still attack back if this is false but hostile is true.
 	var/mauling = FALSE						// Attacks unconscious mobs
+	var/ignore_incapacitated = FALSE		// If it's interested in attacking targets that are STUNNED. 
 	var/handle_corpse = FALSE					// Allows AI to acknowledge corpses (e.g. nurse spiders)
 
 	var/atom/movable/target = null			// The thing (mob or object) we're trying to kill.
@@ -129,6 +130,9 @@
 					return TRUE
 				else
 					return FALSE
+		if(L.incapacitated(INCAPACITATION_STUNNED)) // Are they stunned and do we care?
+			if(ignore_incapacitated)
+				return FALSE 
 		if(holder.IIsAlly(L))
 			return FALSE
 		return TRUE
@@ -161,6 +165,10 @@
 /datum/ai_holder/proc/lose_target()
 	ai_log("lose_target() : Entering.", AI_LOG_TRACE)
 	if(target)
+		ai_log("lose_target() : Had a target, checking if still valid.", AI_LOG_DEBUG)
+		if(!can_attack(target, FALSE)) /// If it's not valid to chase, don't keep looking. 
+			remove_target()
+			return find_target()
 		ai_log("lose_target() : Had a target, setting to null and LTT.", AI_LOG_DEBUG)
 		target = null
 		lose_target_time = world.time