Mobs arent casting spells....

[Astal]

I have it set up for the mobs to heal my boss every 60 seconds for 20k hp. The script is firing but the spell isnt casting. I have a feeling it has to do with $mob->SetTarget(); the ID is correct, but is that the correct code i would be looking for to pick an NPC to cast a spell on?

#Monolith of Lohesh

sub EVENT_SPAWN {
	quest::settimer("HealLohesh", 60);
}

sub EVENT_TIMER {

if ( ($timer eq "HealLohesh" ) && (defined($entity_list->GetNPCByNPCTypeID(999424)) ) ) {

	quest::say("Take our life oh dark one!!");
	$mob->SetTarget(999424);
	plugin::CastOnTarget(21479); #heal
	quest::settimer("HealLohesh", 60);
	}


	
}

I also tried it like this, same result

#Monolith of Lohesh

sub EVENT_SPAWN {
	quest::settimer("HealLohesh", 60);
}

sub EVENT_TIMER {

if ( ($timer eq "HealLohesh" ) && (defined($entity_list->GetNPCByNPCTypeID(999424)) ) ) {

	quest::say("Take our life oh dark one!!");
	#$mob->SetTarget(999424);
	$mob->CastSpell(21479, 999424, 10, -1, -1);
	#plugin::CastOnTarget(21479); #heal
	quest::settimer("HealLohesh", 60);
	}


	
}

sub EVENT_SAY {	

		if($text=~/Hail/i) {
		$client->Message(315, "Script working.");
		}
		
}