@Belwicket He is able to have both Gift and Thaumaturgy, but not at the beginning.
When making CS you get to choose: either 3 Techniques, 3 Spells or 1 Gift.
Later, when you get chance to acquire more abilities you can take, for example, Spells, when you already have Gift.
The only exception (which I don't think I wrote in the CS) is that acquiring a new Gift is not possible through simple point allocation- you have to earn it IC.
So, when I say you get a new ability you can either learn new Spells/Techniques (from scratch, even), but you can only improve existing Gift.
If
@KazeXDZ wants Holy-Demonic (the part where it mitigates the damage from magic, not the entire set of abilities), he can start with it as a Gift and then learn other spells.
@SgtEasy Well, it really depends on you. You can train and lead them, or you can try and directly resolve the issue with the other gangs, which again is up to your choice. You can fight them enough for them to think they stand to lose more than gain from trying to destroy the Imps, or you can negotiate with them, or a combination of both, or something completely fourth that you in your genius manage to come up with :D