I'd prefer if you just focus on one thing and stay away from shortlists. Kind of like jobs, but not actually, you know. 

As for the level of magic, I'm not extremely sure about it, but I do know that I plan on having Imperials having more units who have more potential with magic than the typical people you see in the Undercity. For tech, I'd say that the impoverished slums have semi-modern/modern tech while the more well off parts have more futuristic machinations.