First of all, Fire/ lighing sorc is the best dueling/ pking sorc, don't know wtf is BK talking about. Of couse you need good gear to make a good sorc. If you a pk, go with hydra and TS. But a skilled player, fire wall can own anybody. For Pvm, ts and fire wall is pretty good, and get a act 2 freze merc.

Either way, if you want a good sorc, you have to max mastery of both. So, if you get nova, then you can't get ts, and ts is a must.