oh the added 200% damage bonus should only apply when his HP is below 50% lol (if it's too much, just lower that attribute's value lol). It's his "pissed off" state. When his HP is above 50%, it's damage is penalized by -60% lol.
In other news, looks like Cave Johnson's endless truckload supply of lemons is late for delivery (he runs out of ammo and unable to pick up ammo). I mean only thing you'd need to do is just add 112 ; 9 on his attributes list.