VinnieJones

Flame shock triggers the gcd meaning your sitting on your hands for 1.5s, plus requires that you not be at max cl range. Depending on the fight length and ability to cl (adds, shackles and such) you can go 12/12/12/CL/12/12/12/Cl if you want. It's a bit of a damage boost but an extra 250 mana or so every fourth cast.

*edit* Also, took a look. An extra few crit% you could swap in for longer fights might do some some good longevity wise, and you are 2% over the hit cap on lvl 73 bosses if you have tow down. With your talents you have a natural +12% to crit and cap is 16% iirc. So if you can you could probably swap out some gear for different pieces if you wanted to min/max a bit more*