@David: Gloria is nice if you frequently party people who need it, or help in potting, or level with TU, or if you WoE maybe (not sure). And I'm not sure about Mag 1, Mag lvl 1 will need to be recast far too often :\ . I had lvl 3 for the longest time and I got annoyed with its duration. But if it's what you want, go for it I guess. I just imagine it would suck ass in WoE. People would need it recast as soon as they walk away. I'm not even bothering with Sanc on my priest, not until HP, but I don't plan to WoE until then (or even if I do, I personally would want KE and SW before Sanc, as a regular Priest, for no particular reason xD). but um if you wanted Gloria you'd have to drop one of them, and neither SW nor Sanc are worth being dropped under lvl 7 unless you drop them completely (which I assume you know going by your linked build)....so yeah. i wouldnt know much beyond that though. :\
majority of the time spent on my HP/AB, I have used Res 1. I had Res 4 for a short while, but I reset again to drop it back to lvl 1 to grab other things, and honestly, it has never posed a problem for me. As a reg Priest, I probably wouldn't advise Res 1 unless you have the VIT and gear to not die while casting it though, but yeah, idk. That's actually something I'm trying to work on not doing on this Priest, I'd like to get res 4 on her, if possible. but idk.
Stats, I personally hate low dex with a passion. I really dislike 99 VIT builds. I tried it on my alt acc and while it's nice for tanking...In my opinion, it sucks for buffing large parties, and that's what I hate. That's more of a tank than an FS. /opinionated. FSing is standing on the sidelines buffing and healing people; not mobbing and tanking for them while someone else does the buffing and healing haha. There's no actual need for 99 VIT if you're not pulling mobs/tanking/tanking MvPs and stuff, moderate VIT (50ish or 60ish) works out, however, it really just boils down to personal preference, because both builds work out perfectly fine otherwise people wouldn't do it. Do what you have fun doing. I'm speaking PvE too I guess, as I'm not sure about WoE builds.
and idk that's all I have to say, since I'm not a pro with the class, but I know what's worked out perfectly fine for me.