strickly speaking I have to agree that the blue looks the best in general, but I think that with the mandrake model it takes away from the mood of the figure because sky blue doesn't have a great evil undertone. Thus I have to vote for the green. The three pink and purple are much less convincing than the others.
1,000 witch hunters (trying to get rid of this)
1,000 SM (trying to get rid of this)
680 Tau (newest addition)