Destruction's skill "Storm Magic" increases by 50% the direct damage of spell (works on combat spells and damage strategic spells I guess), do you know any specialization that could be an alternative as good for Sorcerer.

I love my Destruction*2 Fire Sorcerer Goblin (no debuff from Blighted Empire, no need to apply Domain of Corruption on every city) but I was wondering if Sorcerer could be as good with another combo ?

(more on that specialization topic, Air and Earth are really crappy IMO, and it's hard to give Dwarves good terrain happiness bonuses without Creation*2 or Air*2)