first off why do u have survival insticts that ones ez imo, for fights where it's needed s3d, mimiron,...
second yes the numbers of your heals are nice but you can't controll it and this is shown by your numbers 60% overheal(2times and i've given u a very fair margin here), 30% overheal (2times) and one acceptable overheal 18%. imo if more then 1/3rd of your healing is overheal u'r doing something wrong. To continue due to the fact that all healers overheal for about 22% means that your healing isn't needed anyways + i've never ever seen any healer go oom in any of our progress raids another indication that although u'r helping healers it's not needed.
i may be walking on an edge here but basicly what you do is make other ppl's job easier whilst making your job harder, i don't have problems with this on it's own but sacrificing yourself when it's not needed simply feels against my nature.
(what do u think of the rest of the talents i posted btw, discussing is good and i'm trying to show where i'm coming from. i understand your point but let's now go for a concessus so ppl know what to look for and know that imp lotp isn't mandatory ;p)