I've tested
Jade spirit
Hurricane
Black magic
Windsong
Glorious tyranny
And ATM I like hurricane the most. The haste is sexy, can double proc without gaining a useless stat (mastery). If my 15 priest was a 19 I'd probably go with jade spirit because of the extra spirit when you get below 25% mana (happens a lot). Black magic is sexy for say a warlock, doomkin and mate because, it procs off of harmful spells and as a priest, I'm not trying to consistently burst someone. Although, I suppose it's good for priests if your throwing them dots on every target you see, and then refresh them when black magic pops for the ridiculous ticks. +22 pPower is decent, increases healthy and damage but nothing else really, something I don't find very useful at this level/bracket.
I fear all of our once prized and sought after enchantments are now a thing of the past. Rip +22 int
