Prim+ players!!! I struggled with these until I saw someone else here mention to use a HARPOON GUN and tranq bolts... literally a life saver. I've killed so many before trying bolts. 150 went down still with half his health. Pop yurts down face to face with you and dimet inside then do a little dance around while shooting it in the back (back fin works. Big target) boom. Down. Great idea I love it. Expensive but worth it.