1 thing Khat, I keep looking through the trees, the spell lists etc. What makes Mystic / Defiler good with Wards / Heals, it seems 'decent' but I guess it's one of those things were you have to try it for yourself, my friend tried a Tank/Healer combo dual-boxing with a Mystic and was ranting and raving about how amazing it is, on paper though it just doesn't seem the same.
Would a Inquisitor or Templar fill that role even better?