Do you have a shaman in your raid? In which case you should be able to get away with dropping Inspiration. Otherwise get rid of ToT since the only real good it will do is give you more Inner Focussed GH's, which tbh isn't really THAT much of a mana saving.
I pick up Atonment and SoS in my current spec and drop Inspiration due to us having a Resto Shaman (they provide the same buff). I've found AA to be such a useful healing cooldown since it's available so often, and basically since I pick that up it's a no-brainer to get Atonement as well. If the current fight doesn't favor Atonement healing, try to weave in Smite/Holy Fires every now & then just to keep up evangelism. If Atonement healing is effective (so OP for Alysrazor) then it's a plus, but I mainly just use it for AA. I have SoS since we have no Holy Paladin in our raid, and SoS is great when tank healing to get more precious bubbles on the tank(s).
I also don't pick up ToT, never found it to be that useful.