Originally Posted by Meddler

I don't have enough priest experience to comment on most of your post, can take a stab at the last couple of points though. If you can afford to skill it up enchanting is generally considered one of the best options simply for those +20 healing ring enchants. Engineering has been a popular choice, particularly for Rocket Boots, but from the sounds of things that's being nerfed come 2.4.3. I'd personally probably opt for jewelcrafting for the JC only gems and depending on what sort of gear you've got access to the trinkets, but it's no big deal for the 2nd slot really.

Honour wise the PVP trinket, S4 neck, S4 belt and S3 ring can all be grabbed with honour without any rating so make for obvious first choices since there aren't any common PVP replacements for those. You can also get the arena offhand from memory without any rating requirement and that's a solid ammount of resilience.

Beyond that it'll really depend on whether you're able to work your arena ratings up at all, if so grab the rest of the S4 set as it becomes available, if not you'll then have to decide whether you need to buy S3 bits to improve your rating or whether stockpiling them for a future date when you can use them's more worthwhile. Unless you make swift progress grabbing the S2 shoulders for honour's almost certainly worthwhile too, since the only replacements require at least 1950 rating. The S2 shoulders, paired with the S4 gloves also give you access to the 2 set bonus, so it's probably worth making that a priority. Two pieces of the blue reputation PVP set will also grant another +35 resilience bonus which should be well worth the effort for slots like helm/chest if you don't have easy access to PVE tokens to hand in/don't love grinding honour for gear you'll hopefully replace in the moderate future.