the only difference between this spec and deep elemental is lack of ToW, and thunderstorm, which i almost never used, never had mana issues, and knockback is bad, unless your tank sucks and cant hold agro. The dps gain is quite a bit mor ethen ToW can bring to raid.
My raid starts in 3 or so hours, after Im done Ill post wws for whole night, and we'll see if its really worth it