Picking high half-elf gold draconic sorcerer, will give an extra cantrip of your choice, disguise self (handy for certain dialogues, but especially useful when picked before talking to the dead. It's the only utility spell I pick, because there is no scroll for it in the game).
I will always pick magic missile, burning hand, then sleep or chromatic orb. I've found that despite its usefulness, I don't actually use CO in combat, so for future sorcerers, I might just pick thunderwave.
2nd lvl spells are always shatter and scorching ray. You can get both an amulet and scrolls that let you misty step.
With both shatter and cloud daggers, btw.. be sure and try and make the companion before your sorcerer (and after the targets turn) use shove on enemies to get them in a nice tight group. xD Killed four goblins (a wounded lock and three archers during goblin boss fight) with one Shatter.