dont forget 1 into frozen armor, it freezes enemies and boosts ur defense by high %
btw: does cold mastery affect frozen armor ?? cuz my new mf sorc is gunna lvl to 93 soon and since alot is maxed allready im planning to put 1 into Cold mastery
i found it better to go along with some lower level skills (e.g. c lightning, fireball) and the synergies until about lvl 35-40 then start on the masteries and higher level skills, i got lots of pk's with a sorc like that then waited till about lvl 40 and put every other stat point into frozen orb and cold mastery
Max out charged bolt, lighting, and chain lighting. Its mroe then enough damage. Then toss a point into Thunderstorm and Warmth and work on maxing out Telekenesis and like 5 into Energy shield. Telekensis synergizes ES by taking less mana so you can put more damage to your mana. THis makes the Lighting sorc which has to get pretty close able to take hits.