I'm not that picky. So far I have a storm beast with may cast elemental blade, storm crit and storm damage. THe dream would be double resist double damage may cast fairy but I am down for anything
I would have to say Spinyfish! With its storm boosting talents, Spell-Proof, and Spritely, the Spinyfish will make any other storm pet look like a piece of trash that somebody forgot to throw away.. However, if this pet is unobtainable for you, Storm Cat is the way to go!