Xhul has a lot less hp than he did before, so he's a lot more easier to zerg than he was before (I know it was not hard in 6.2, but it's even easier now). So, you can basicly just pop lust and cds at start and watch him melt. On chains, you can use personal cds or whatever, I have not seen a person die to them in pre-patch. The damage can get quite high, but your healer should not have problems with mana due to the fight being pretty short.