Alright, so I'm getting back into multi-boxing after about 1 1/2 year break and am going to be 5 boxing again. What I'm really trying to decide on is my tank and healer. DPS I'm not too worried about but the tank and heals are a more important decision. My first question though, how are priests as multibox healers these days (primarily talking about leveling, won't really be doing endgame).

If they are any good which is the better choice? Holy or Disc?

Thanks in advance!