I suppose the main justification of AST's DPS model is that AST has a whole other system in their downtime and this was fine, it meant all 3 healers contributed to rDPS differently to suit different tastes. AST for me is the best of the 3 healers to play these days because they've not scrapped cards, which means they have more to do. That said, the cards aren't as fun as they used to be as they feel a little more dumbed down...but it is still better than how things are with my SCH.