This is what my sorcerer is looking like to hit New Game Plus, also a base guide for aspiring casters.
Vgr - 20 - Most bosses will one shot a sorc on ng+, no point in having much health anyway.
End - 18 - A bit more than default, allows more rolling and casts. Cloranthy Ring helps a ton.
Vit - 5 - You should never have issues with weight as a sorc
Atn - 50 - Attunement is the 2nd most important stat for a sorc. Not only at 50 do you have 8 base slots, but it also increases your casting speed AND agility. Vital. You could go to 75 for 10 slots if you like, but your Faith/Vigor/Endurance would take a hit or you’d be less likely to co-op or pvp as your level would increase. Also, best of all, increases number of casts.
Str and Dex - 18 -Minimum for the Moonlight Greatsword. Enough said.
Adp - 8 - We don’t need it that high since Attunement helps agility, depends on your playstyle.
Int - 56 - No brainer, Intelligence is most important for a sorc. Really, you could easily get away with a lower Intelligence since Simpleton’s spice are abundant enough to lower Unleash Magic and Soul Geyser. After 50 your Magic attack increases will drop significantly. Also increases cast speed.
Fth - 18 - If you use NO hexes, Faith is actually more or less optional. But it also increases Pyromancies, so it’s good for those encounters where enemies are magic resistant. Also increases cast speed.
Right hand - Pyro glove +10, Magic Staff of Wisdom +5 (CANNOT cast HEXES, so replace with Sunset Staff if you’re a hexer), Moonlight Greatsword +5 (bonfire ascetic on Freja)
Left hand -Random catalyst for Crystal Magic Weapon, Llewellyn Shield +5 (although your shield will change or be taken off completely depending on the situation).
Rings - (also situational) Cloranthy and Clear Bluestone are a must, upgraded versions recommended greatly, Southern Ritual Band for more slots, and one random ring for variational purposes. Usually a resistance of some kind or steel protection, maybe Third Dragon Ring in a pinch.
Armor - Lion Mage Armor, Cuffs, and Skirt all +10 (cast speed explosion), and Black Hood (although this can change if you need more clots, more casts, etc.)
Spells - Great Heavy Soul Arrow as base, Soul Spear, Soul Greatsword (great for swarms), Crystal Soul Weapon for the melees, Flame Swathe for incredible damage, same with Forbidden Sun, and Soul Geyser (Boss killer).
Last tips - Farm the Soul Geyser from the Shrine of Amana (Guardian Dragon) a few times for those tricky boss fights. Sucks in PvP though.
Bonfire Ascetic on Freja once, maybe twice. Moonlight Greatsword and Crystal Soul Spear.
With low Vitality, fast rolling with all this equipment is impossible, but be smart. For the ancient dragon, unequip the shields. You’ll die all the same without it.
Keep your shield up, but dodge like a bitch. Most melee attacks in NG+ WILL one or two shot you.
Unleash Magic is awesome for bosses since you’ll get one-shotted anyway.
That’s about it! Any questions ask them, I may alter this as the game is patched or a find better and more efficient methods. Also, this is primarily a PVE build, I’ll do a pvp one later.