Yes. You might want to help that by taking the otherwise worthless Spell Focus feats for Enchantment or Illusion (I recommend Illusion over anything else).
Anyways, if the party level is actually above 4 (you never stated), drop half-fey. The vast majority of what you get from it you also get from Unseelie Fey; the good parts, anyways (flight, etc). This gives you more levels to play around with, and class levels are always, always better than level adjustment.
Give us more to work with. Give us books allowed, starting level, any houserules, etc.