*does a quick check in [url="http://db.gamefaqs.com/computer/doswin/file/baldurs_gate_c.txt"]Dan Simpson's BG Faq[/url]*
10 or above means a "Good" power, 9 or lower an "Evil" one.
First two: either Cure Light Wounds or Larloch's Minor Drain
Next two: either Slow Poison or Ghoul's Touch (I'd go for the Slow Poison)
Last two: either Draw Upon Holy Might or Vampiric Touch (one of each would be nice).
Vampiric Touch gives huge Hit Point bonuses, even if you use it on yourself.