Deathclaws ;_; (Fallout NV)

I hope here are some people playing this game. If so I want to ask a question. There are no spoilers here.

So, I headed to a quarry and found something like their nest. I can 1v1 them, but then I have almost no HP. The problem is that there are around 7-8 of them.

My question is how can I kill them fast and effective(possibly without using any chems)?

Power armour and a multi-laser is the best way :)

But yeah...I didn't have that for this bit either. As I remember, I snook in close and planted a bunch of mines/explosives, then retreated to a safe distance and put a few long ranged rounds in them to aggro them towards me...boom. Clean up with the biggest guns you have available...