First thing, he seems to not enrage if you kill him quickly enough, so drop a heroism on the early side to get full use of it. Bunch the DPS up in a corner so he can't land behind them, and stay close enough to them so that your consecration will hit him when he changes targets. Stop hitting your DPS keys (but keep healing) for a second when he jumps. If he spits on the whole team, which he will, simply start spamming AOE healing until everyone is back to full. Until he enrages, he hits the tank lightly, so it shouldn't be an issue if you burn him quickly enough. If he does enrage, pop a shield right away to reduce damage by 50% on the tank.