Well since my flash heal is not instant anymore what should I be using as my main heals. I DON'T have prideful right now and probably won't he getting it. My Gs is around 516. I know its not good but I have to start somewhere.

Also this is my only character on this server, I am having a hard time gold farming because lack of aoe dps. Where can I go on timeless isle to farm with my priest? Would I have to switch to shadow for dps just to farm or do I have to make a whole new character.
The reason I want to farm on timeless isle is I need lesser charms right now to upgrade my gear to get a gs of at least 530 and I just need these charms :(.

also earning gold on timeless really doesn't matter to be but it doesn't hurt.

Priest is not the best farmer also I think you are taking about holy having?

flash heal was never instant

you can get instant flash heal procs from surge of light which procs off smite and any holy spell, most notably it can proc off holy nova and our 90 and 100 talents, divine star/saving grace to grant extra flash heals

penance and shield are your two core healing spells, keep pom rolling for the extra healing as well as extra dispel fodder for your shields

if you get spell locked on a hard cast and you're being trained you can use spectral guise defensively to bait out a couple of seconds in the spell lock until you can cast again