I'll start off by apologizing if this has been extensively discussed. I scrolled through the first 5 pages of threads and didn't come across any "conclusive" evidence as to which relics a Sorc Healer should use, so I decided to do some theorycrafting...
Linked is an image of the spreadsheet I used for this analysis:
http://i.imgur.com/x9HvKFl.jpg
I have around 8% alacrity, and did the theorycraft for a 2 minute duration, assuming constant casting on two healing spells, Dark Infusion and Dark Heal
To keep it simple, I did the math under two (false) assumptions:
1) Force is unlimited (no one can cast 86 Dark Heals in 2 minutes)
2) Relics proc 100% of the time, all the time
IF Serendipitous Assault and Ephemeral Mending proc 100% of the time, on your first cast during the next proc cycle, they will be your best choice for overall bonus healing.
Unfortunately, I have the weakest PvP old-school relic, perhaps those numbers would be better with the Elite Warhero ones, maybe enough to overtake the SA (under the same assumptions)... but since those have been eliminated from the game, I have no choice but to go SA + EM, which realistically, should turn out to be the closest to these numbers (4 DH cast during 6 second proc of SA is possible)
Thoughts?