Going by the armory in your profile, its a disc priest (spec is important).
Since you'll be targeted as a healer, you'll want to balance your healing power with your survivability. If you get focused, do you have enough defenses to live long enough to keep yourself alive? If you get opened on by a rogue, do you have enough HP to survive the cheap shot (assuming trinket is down)? While you might want to trade off a few pieces for "glass cannon" pure int - having a good bit of stam/verse is super helpful. So its really up to you if you want to use spellpower goggle extreme or a green lens of the aurora.
Verse is also just super good since it directly influences heals, damage, ele force damage, and reduces incoming damage.