From all the research I've done, the best way is:

-Know the distance to stand to avoid 1000 Tonze Swing and Eye of the beholder. Both AoEs WILL one shot you
-Tank must know when to start running from 1000 Tonze Swing which will make Coincounter fall on his ass for a little bit if it hits nobody.
-Keep a sharp eye on the chatlog and watch for Animal Instinct. Nobody should attack/cure/anything until the tank receives full hate again from Coincounter.
-When adds pop, kill the adds closest to you if their skills will be able to hit you. They can Silence you which is incredibly nasty for the fight