When is Cold Sorc better?

I have all end game gear including infinity and a decent fathom plus Nightwing. Is there any farm that is significantly smoother and faster at Player 1 for Cold Sorc? Or do I just run lightning like everyone seems to play?

At P1, nothing comes to mind.

At P8, I had much better experience with the Council as Blizz sorc than I had with my Infinity Lightning sorc.