Planning to rush in nm or hell?
If nm, pick any main skill - max it and its synergies (I'd say go fireball or chain lightning or orb or blizz). Gear that grants you max res, decent amount of life, and some +skills will be fine. Nm is e-zay for a sorc. I'd say go lightning tab, cuz + to lightning skill items will make your tele cheap. Some fcr is needed there too.
str = depends on gear
dex = none (don't need block in nm)
life = all after you figure out str
energy = none (mana from gear and/or insight merc)
If hell, stats and skills won't cut it. You'd really need some "godly" gear for certain areas.