i will say this, hungering blade is rough going as a source of healing. bladedancers want to consider mask of the third man or a raid helm with infusion for sure. I don't have any raid helms and haven't leveled the Mask so i'm out of luck. But also kind of committed to getting it done with the handicap, then coming back for easy mode, lol.
All you need to do is fill in the first exp bubble and pay for it in the mask. I was doing that last night. You and your team mates create orbs in the back area near the rock or wherever you want. And if your low on health go back there and switch to the mask and grab an orb and watch you health go all the way back up then switch back your armor and jump back into the fight. I was doing that last night.