[@PigeonOfAstora] Muscle wizard is an entirely viable option! As far as the alteration magic goes, it can definitely reach superhuman levels, though in a student it probably wouldn’t be at an insane level just yet. 

[@Lord of Evil] So pact magic in general would be the rituals and knowledge necessary to make a pact with something like a Demon. Not every Warlock would necessarily make use of it, since you have some who kind of end up in a pact by accident. However, pact magic also includes any special kinds of magic specific to the Demon you have a contract with. So if your Demon had a particular theme or concept that you wanted to reflect in your characters abilities, that would fall under pact magic.