Stackable buffs and group heals?

[Meshuggenah]

I was under the impression that Cleric classes could gain passive healing from their damage, similar to Chloro/Bard by speccing 11 points into Justicar for Reparation? Though, I'm not sure how well 10% of damage scales compared to Bard or Chloro healing. Obviously, the healing would be less.. but from the videos I've seen, Inquisitors seem to do significantly more damage than Chloros?

I'm also really liking the look of building a group around a couple of Cabalists with improved Maelstrom. I boxed a PBAE group with AoE pull in WAR and it was devastating in PvP. Again, not sure how well it would translate to Rift, though.

Also, I just noticed that site doesn't mention whether or not DoT's / HoT's stack. IE: If two or more different characters cast the same DoT/HoT on the same target, do they stack?