Kill him, @Craig. Come over to the dark and efficient side.
To the Righteous belong the fruits of violent victory. The rest of us will have to settle for warm friends, warm lovers, and a wink from a quietly supportive universe.
Would you describe in detail for us what exactly you are doing in the whole glacius process? Maybe we would be able to catch something that way and help you out.
Yin and Yang balance. There is one within the other. No Difference in Reality. What do you experience?
Craig what spell are you casting? Use mental domination not charm person. His saves are really though so it might take a little while, keep at it if you want the XP.
You get 24,800 xp for sparing his life. Thats 4133 each for 6 party members. It's worth it.