I was messing around on the PTR with them as well, I found that the only time mana was an issue at all what when I used consecrate in a regular rotation. Seriously if its 3 mobs or less its not really even worth it, HoR and HS are plenty of threat. With HoR actually proc'ing seals on all 3 mobs in addition to the base holy damage its quite a punch.
This is the spec, I'm currently using on the PTR.
http://talent.mmo-champion.com/?pala...10251533312301
Seals of the Pure is rather crazy if you're using SoV since HoR will apply and refresh it on all 3 targets. I'm thinking filling out Deflection and Benidiction and Imp Judgments on the way to 80. Judgments of the Just just isn't much to my liking, honestly. Since Thunderclap hits multiple mobs JoJ just doesn't seem as special.