Erm... although support is not my best role I can tell you some mistakes here.
You are exceeding the CDR cap by so much it's not even funny man, max cool down reduction is 40%, so you could replace some runes, mastery points and maybe items for much better choices.
Also I don't really see the reason of Deathfire Grasp, if this were a build for a ap nuker or somethin like that ok but for a support...
As I said I am bad at supporting I can't tell much but maybe consider what I said.
And also turn on "Require comment to vote" in the editing page so you don't get troll voted.