You want to go with gear that gives INT & STR, but no DEX. Most sorcerers seem to prefer more INT & less STR like the demonlord "of security" set gives. This setup gives max damage. However, I've found I do better with the demonlord "of will" set which gives more STR and less INT. It gives much better survivability which for PvP does much better (at least for me it does). Either way, I would avoid DEX in both your gear and your stats as it doesn't do much at all for you.