I don't know if the ghost will heal your creature, but I only had it killed off a few times (generally when trying to take out mobs I knew in advance would be a little high for my level).
Hide is Shadows might work better than Fear or Blind for defensive purposes, though would be a little more passive (however, you'd only need one skill point in it to simply reposition yourself when opponents got too close).
Kills by Charmed opponents don't give as much experience as those by your character (or creature / summon).
I'm planning on starting a ranger character when DKS is released, but will probably just switch to melee when opponents get close.
Welcome to the forum.
