Here’s my Orb/Static/Nova Sorceress build, which works for the playthrough as well.
Skills
Cold: 1 point all cold skills except Chilling Armor
Fire: 1 point Warmth
Lightning: 1 point Telekinesis and Lightning Mastery, 5 Nova, 7 Static Field, and Teleport
Depending on what gear you find, you may want to put more points into Teleport and Energy so you can chain tele. If you have extra points, use them at clvl 31+ to increase Orb and Mastery at the same time.
Combat: Cast Orb, Static, Static over and over. If you run into a Cold Immune monster, static low and use Nova.
Against Diablo and other bosses, static them low, and make sure you Sweet Spot your orbs. That’s when the explosion at the end of it’s tragectory happens right inside the monster. This makes all the shards hit instead of just a few.
Stats
Up to 60 Strength so you can wear a Plated Belt, no dex, up to 50 Energy, rest into Vitality. Maybe 70 strength if you find a nice pair of Greaves.
Items
Ancient’s Pledge Large Shield (can buy the base from Farah), Stealth Armor, FCR jewlery
Weapon ideally Spirit Broad Sword. You can find the base 0 socket in normal cows, and socket it at Larzuk.
As a backup for Spirit, you can save magic orbs and cube them with 3 chipped gems for new socketed magic orbs. Hope for +skills, fcr, life, mana, resistances. Can put some jewels or Tir runes in there too.
Boots, belt and gloves you can find or shop in act 5 or NM. Look for life, resistances you’re missing, hit recovery, etc.
Helm Lore, but you can try your luck with a circlet imbue at lvl 30.