I'd actually been thinking about a 61 point talent: Prayer of Shielding, and was trying to go over numbers in my head that would make it work (30% base mana cost, 2 minute cooldown, aspiration bringing it to 1.4) but hey if Blizz is gonna do the work for me with PW:B then by all means :P
Serendipity ought to be a little fun about weaving heals in to increase HPS somewhere along the way.
Edit: Although, if they're going to make DS baseline, in my opinion, why not combine Imp DS with Imp Fort (at the Fort spot on the tree). Make it two points we're already going to spend in the first place? Or is that just too easy of 101 spellpower for Holy, too easy for 96 spellpower for Shadow?