I would go Spell power cure on my healing build but I know I will never actually get that set.
You should be able to open a couple of chests and get 4 pieces.I've done vWGT a dozen times (not a lot I know), but still pretty amazed over the fact that I've gotten exactly 0 pieces of any set.
1st boss - ONLY drops pants and belt (2 embers)
2nd boss - ONLY drops shoes and gloves (4 embers)
3rd boss - ONLY drops chest and shoulder (8 embers)
Kena - head (all sets not just her helm) (12 embers)