You should swap Conviction in Ret Paladin for Thundering Strikes in Enh Shaman if you are AGL based and not STR.
You should swap Divine Strength talents for Combat Experience in Marksman Hunter for AGL to hit instead of STR.
You may want to get Grace from Dis Priest for 9% stronger healing.
You may want to get Empowered Healing from Holy Priest for stronger greater heals.
You may want to get Inspiration from Holy Priest for up to 9% less physical damage on the tank.
One thing to think about is Circle of Healing and Dark Transfusion are doing AOE healing. You may not need the Epic Enchant Holy Ground to be doing more AOE healing and instead use it for the Holy Servitude Enchant to help your single target healing.
Judge, Jury, Executioner is used to generate combo points but you may be able to use Turn the tables and Seal Fate talents in Assassination Rogue to do that job and that would free up the Epic Enchant to get Higher Power for even more powerful Greater Heals.
You will also want to make sure you are hit capped and expertise capped so you don't lose out on getting those combo points with dodges and misses.
You may also want to get Flash Heal which doesn't seem to trigger the buff but does get mana reduction as you grow to 3 stacks.
You should probably swap Rockbiter Weapon for Everliving Weapon and get two points in Blessing of the Eternal in Resto Shaman.