Most sorc MFers in classic dont run chaos sanctuary.
So they concentrate on one element and farm bosses that can be killed with it (usually Andariel + Mef; sometimes Duriel too).
Andariel can be glitched, same for Duriel (although Im not sure if Duriel is worth to farm if you play legit); Mefisto is best to farm with open quest, in games made with other char.
Generally you probably want higher Ilvl drops, unless you want SOJs.
Technically you can make CS with a two element sorc, but it is slow (and every now and then De Seis will be immune for 2 elements, so your hope is using static + stabbing with shard, what barely works in hell difficulty) - IMHO not worth it, but your mileage may vary.
And as for your question: most players either go full Blizzard, or Full orb. There were some that went fireball (or Meteor), but that was rare (Andariel is vulterable to fire).
When it comes to damage Bizzard > Orb > Fire sorc (and fire sorc is useless in Chaos sanctuary).
But the difference is the rest, many players like Frozen Orb, since you can have high (or even maxed) teleport, so less mana pots used.
I think Blizzard or Orb is a matter of preference, but robots do better with Blizzard.
This post was edited by dropship on Jan 23 2020 05:48pm