UnsureJedi

I see the farseer code, it uses the filter functor to isolate an enemy unit meeting the requirements for the ability and use it if GetClosestSquad() finds the squad meeting the functor. Now, following this example, I just want the farseer to attack the found enemy (I know that in this example the target is friendly but let's suppose its not if I replace GetClosestSquad() with FindClosestEnemy()) instead of performing an ability on him. But I cannot find the DoAttack() function which I would put instead of DoSpecialAbilitySquad() function there. I know there are functions DoMove(), DoAttackMove(), DoStop(), DoRepair(), DoSpecialAbilitySquad(), DoReinforce(), etc., etc., all of which do what it says in the function name. Yet there is no function DoAttack(), or that's what it would be called.

I misunderstood your previous post a bit. Of course I won't be searching for specific unit names. That was just the test sample: "tau_ethereal_squad". I've even commented it for myself. I would later replace it with a functor like the one in farseer tactic.

Ok, so I have changed the "commander" effectiveness of assassin's exitus rifle to be higher than all his other effectivenesses and I can say with 100% certainty that it did not work. Here is the assassin field in guardunitstats.ai, where I've changed his commander armor effectiveness to 20.0. And I've also attached the screenshots a moment after the assassin's shot in game: a clean screenshot and with the console open (to see the printed output from the function above). Just as code in the original post was supposed to do, he detected an ethereal (top middle of the screen) in range of 50, activated the scope.... and then shot his bodyguard at the right of the screen, all despite the ethereal being closer and having supposedly higher effectiveness against. Back to square 1, unfortunately.

Speaking of targeting enemy units, thudo, isn't this what DoSpecialAbilitySquad() and DoSpecialAbilityEntity() do? They are used by all abilities that require a specific enemy target. For instance, tau commander's "Target Acquired", all of the psyker's abilities and so on, which the AI uses freely. Feels like replacing "do this ability on this target" with "do right-click on this target" (attack this target) should be the simplest of tasks if engine's source code was available. Feels weird why wasn't it implemented initially. Oh well.

{
		name = "Assassin",
		sbp_name = "guard_squad_assassin",
		ebp_name = "guard_leaders_assassin",
		class = UnitStatsAI.UC_Commander,
		rating = 7,
		potential =
		{
			{
				name = "guard_exitus_rifle",
				effectiveness = GenerateUnitEffectiveness(8.6,8.6,8.6,8.6,8.6,5.4,5.4,5.3,8.6,7.4,20.0,0.4,0.7,0.0,0.0,0.0,0.0),
				range = UnitStatsAI.RT_Ranged,
			},
			{
				name = "guard_exitus_pistol_assassin",
				effectiveness = GenerateUnitEffectiveness(7.6,8.1,7.9,7.9,7.1,4.5,4.8,0.0,7.7,0.0,6.7,7.9,6.6,5.8,0.0,0.0,0.0),
				range = UnitStatsAI.RT_Melee,
			},
		}
	},