Is this designed for dungeons and raids ? if so you are missing alot of +hit talents...since you need roughly 16% from gear and talents together.
And will this work ? yes it does, but most standard and heroic dungeons are easy as cakewalk.. even as firemage with single greater heal can be the single healer, ofcourse its really annoying for the tank....
It is interesting build, but its all over the place and too many things to do at the same time and cant focus on one thing lets say melee when you need to start spamming heals.
Fishing with maelstorm weapon works well when you combine it to Damage skills on heals it might be too unreliable.