Easiest way in I found. Have ok flak and pike. Scout around to see other wild Dino’s to flame absorb. Lure the one Pyromane into water. Pike from under until roar. Nest most importantly go to the wild Dino’s you saw prior and attack. As soon as the flam meter fills half way flame absorb. Keep doing this constantly. The more wild dinos in an area the better. Watch out for high lvl rexes and other pyros. Flame absorb constantly is the key. Each time you absorb it resets timer as well!