Are you at 15% during the 3rd, or 4th Jealous Male? If 3rd, then you actually have too much DPS, as I recall the hard enrage will not happen until after the 4th Jealous Male spawns (5:45 into fight). (I'm sure someone will correct me if I am wrong) If you are close to 15% before the 3rd JM spawns then stop DPS until he is down then go all out on the boss during his soft enrage/spawning champion adds and hope you can keep enough ppl up to finish off the adds. If you are getting a 4th JM spawn then, yes, there does need to be more DPS.