"Ballistic" deals with the trees with guns, even in Close Combat, while "Melee" deals with any of the martial art trees. If you want to focus on Martial arts, put your points evenly as you level up in Focus (Which improves your damage) and Belief (Which improves your accuracy). If you want to concentrate on using guns, pool your stats evenly in Perception (Which improves your damage) and focus (Which improves your accuracy).