Ah, Solo Sorcerers. Food for the masses.
Solo Sorcerers are amongst the easiest BG2 experiences once you get going. Here are some general guidelines:
Early Game
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In early game, count on the Wand of Monster Summoning and/or the Wand of Cloudkill. Selling all the loot from Chateau Irenicus and the Circus will grant you enough money to purchase one of the two - depending on your playing style. The wands, in conjunction with Web should easily solve all the early quest for you until you're level 14.
Web is the spell of ultimate mastery in the early game. Web + Spider Spawn (
PICK!), Web + Cloudkill (from the Wand), Web + Melf's Minute Meteors... they're all
very powerful combos. Throw some Slows, Greater Malison and Emotion and you're on the ball.
Early-Mid Game
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Thou shall bow before the might of the Projected Ones. [img]tongue.gif[/img]
Read the BG2 Spells Reference (link in my sig) if you still don't know how to beat the game with just Project Image.
Just one more level, and you're already...
Mid-Late Game
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...level 15. Congratulations - you may now summon your first Skeleton Warrior. I assume their powers are well known to you (again, if not - refer to the Spells Reference). They only serve a sole purpose, though - which is to bring you to level 16. [img]smile.gif[/img]
Late Game
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With Skeleton Warriors, Mislead, Project Image and, now, Abi Dalzim's Horrid Wiltings, the rest of the game should be a cakewalk. Ireni-who?!
As for equipment goes... Being a Sorcerer, you don't really need equipment. A naked solo Sorcerer is a unique and fun game, actually. If you're not interested - the mandatory Robe of Vecna, Amulet of Power, Boots of Speed and Staff of the Magi springs to mind.
Have fun, and good luck! [img]smile.gif[/img]