You should shoot for 3 electrocutes transitioning to phase 2. During phase 2, focus on getting the adds down asap so you can move to phase 3. Now as for the adds, you really can't CC them...your tank just needs to get better at kiting them. As long as he has a boss mod, he should be able to drop them every time; even when the fire ball comes in 10 second increments. When that starts to happen he/she will have to kite until 5 seconds - stop (so the adds can catch up), and start moving again at .5/.7 seconds, and repeat that until nef is dead. Oh and make sure he isn't back peddling, but strafing. Before we had him on farm i was under the impression that they can get behind you and gib you....i was wrong, that never happens (I suppose it can but its so rare...) As for making sure you have enough room, that will take practice on the tanks part. He can't run too far because it will always end with him running in to fire that hasn't disappeared yet.