There are things in your spec you need that you have not specced into and for that you will want to use the one I use: The World of Warcraft Armory
Lightwell is really not needed cause b/c of the amount of dmg going out the minute you get hit it will despawn plus why would someone run back to click it when there are healers in raid to get them up. Body and Soul is a 50/50. I don't use it cause I run with a disc priest that bubbles people before I do and still in Ulduar I have found no reason to use it. Divine Providence is a MUST cause of the cooldown of POM which i use whenever it is ready plus the increase in heals.
As for your glyphs, replace power word shield with Prayer of Healing cause you will add an extra hot on people when you do POH on them. Mine ticks for 550 or so for 6 seconds. Your minor glyphs are good.
When collecting gear always gem ur blue sockete with the 16 spirit which u have done so already. Yellows Int and reds either do SPELL + Crit or SPELL + INT. you do not need to gem staright spell power. Ur spell power will increase with the spirit gems. I sit around 2500 raid buffed. Remember you want to have as much mana + mana regen while casting so that you can stay in a fight longer. See how I've gemmed my gear.
Your trinkets are decent and your probably going by what you have sgotten so far but just to let you know THE EGG is the worst trinket you can probably have for Holy. The final quest from dragonblight on top of the temple is better than it. You will want to get SPIRIT WORLD GLASS from 10 man naxx (Gothik the Harvester) as well as SOUL OF THE DEAD from 25 man naxx (Sapphiron). Once u get into Ulduar go for SPARK OF HOPE and you will replace SPIRIT WORLD GLASS with it. Keep SoUL OF THE DEAD. The more crit you have the more you will proc holy concentration which = to mana regen.
*Note: The spec I use I does not use Greater Heal as much b/c Flash Heals is our primary heal now.