On your third battle with the T-4-L {A.K.A. Thugs=4-Less} leader when you have to rescue Angela, he will be using some kind of Megacorp destucto robot. Use the gun turrets.When using one he should walk away. When he stops shooting those floating bombs. He will try destroy your turret. As soon sa he comes to you, exit the turret. Then he will focus on you instead of the turret.After maybe five seconds or more get back in the turret and he will walk away to fire more floating bombs.That way you don't have find another turret. Note: The T-4-L leader might not destroy the turret. He MIGHT not.