Use a good pack of allos because of their pack boost and their bleed (-5% health, no matter the amount yetis have) or use good wolves also because of their pack boost, ⚠️you might loose a few of them⚠️
Thank you for reading and sorry for my bad English, I'm French.
This albino gorilla is your exp friend, get a good cave pets like cave dire wolf, give your wolf an ascendant flak helmet, shoot the head of the yeti (more damage) with shotgun, and done. You have ~2000 exp (if you play in medium)
If u tamed a wolf from this cave by kill him and take his implant and call him out the cave made a helmet for him and u can kill yetis and any creature in this cave cuz ur wolf will be lvl 900 and yeti gave a lot of exp for killing him i did that many times