I don't think there's -much- difference between the two reforge set ups since you'll be reforging haste primarily. The mastery set up is for a bit more consistent burst while the crit set up might better for survivability, but also adds to sustained damage since ele shamans do 250% crit damage/healing instead of 200%.
Basically add /stopcasting on most of your important, instant cast abilities; grounding, tremor, maybe call of the elements etc..
Besides these macros, there's nothing to ele shamans. I recommend having party macros like the cleanse spirit/healing surge macro as well as a /stopcasting macro on a seperate bind in case you want to juke your lightning bolt.