i think with more defined character types like for instance from the game star wars the old republic MMO.
so youd need things like beaters, tanks, ranges (of differing damage types), mage, healer and any others.
when it comes to writing you need to be careful to not let the AB aspect be this foreground thing the AB aspect is best as a background thing because it seems the AB magic is more like a means to an end and it would be interesting to see the depths of the madness the protagonist is going down.
but would the protagonist in the story be seen as a hero? villain? anti-hero? would they be seen as sane? insane?