I don't seem to have the right posting style to make observations here without suffering infractions but something I REALLY wanted to bring up so if possible please try and see the merits of whats being suggested here. I've got little hard evidence to back it up except personal increases in DPS (briefly reaching 13.5k 10m buffed on the trash before magmaw when the star's aligned which is about as "tank n spank" as it gets at the moment).
Would:
Talent Calculator - World of Warcraft not be a better default enhance build?
Considering there's not THAT much trash we can AoE down flame nova seems like a waste of talent points. While improved shields doesn't add much at least it's dps we use on everything.
From the elemental side call of flame only improves the dot from searing totem. I'd think 3% increase in all damage except white hits and stormstrike would eclipse it in pretty short order? With searing's targetting being slightly bugged at the moment (though re-dropping after engaging seems to work fairly well) this likely does even less for us.
Finally the last point in Reverberation of course gives us our shocks more often which is likely the best use of the remaining point considering the space we have regarding our global cooldowns at the moment.
Sorry it's a bit crude by usual EJ standards. If it sparks any interest I will try and back it with some numbers etc but hopefully better qualified folks will save me stumbling over it and making a bigger fool of myself

This ones very much "gut feelings" and personal observation at the moment.