Predator Hit Points Per Class

Is there any information that details the damage required to take a Pred down per class?

With a fireteam yeah its easy enough, but on my own, a closing Pred with full health just laughs at my extended mag clips (assault rifles). Which I suppose is correct, but ive no idea how many shots I need to expend to get close to taking one down. Ends up in a mad melee spam as soon as they are in close quarters and my clips done. Reload takes an age and your dead before it even happens in most cases.