Fire sorc, i had 1 death throughout normal and nightmare only because i underestimated mephisto.
Flame strike is insanely strong for boss killing and flamefront is great for trash, you will never have any issues with damage only with survival.
Plus you have the best potions in the game as a sorc. Symbol of Esu
I have not crafted any honorifics or runewords btw, which would have made it easier, make sure you use the 1 rune rws in normal.
Always use orb/shield as a sorc for survival, plus they give you the best stats over staffs later on.
here is builds for all caster sorcs. I do not recommend using cold or light until 120, i tried it and i don't like the main skills.
viewtopic.php?f=40&t=51313Actually they removed moon potions, that was the final nail in the coffin for me, i'll stick with the older versions of Median