As Magento alluded to above, what you are doing, inadvertently it sounds, is trying to make a Battle Troll. HL is particularly well suited to this but you have way too much DPS gear. My HL Battle Troll has a DPS ring, Hands and OP Head I believe. At CR 165 his Vit is about 6700 and Precision about 3500 baseline. My POT tick is about 520 I think. The ability of the HL Troll to do Combo AM damage has made this "hybrid" possible BUT as others had said you do still have to function as a troll first and foremost. I learned this the hard way with Celestial Battle Healing. Got so focused on damage output I wasn't healing well. Same goes here. You'll be able to get through maybe one longer combo rotation before having to cast a Recharge for someone. You still need to have all the Troll powers, POT, IPH, Debuffs, but since most can be mapped as combo starters, it's actually an advantage. There are going to be many times that you will need to go into a "battery" mode and just do WM/Recharge with no Combos. Another critical thing to look at when deciding which DPS gear to use is the affinities. Never use a DPS piece where there is a Power Crit Chance or Magnitude. Those are your margin of error pieces for keeping your Healer and Tank powered up.