//TECHNICALLY// any form of combat will be possible for all characters, since there are //no// classes. A character who's built similar to a Paladin can still use magics other than holy/light. A "thief" can use a greatsword. Because parameters can be built in anyway and because Skills/Spells can be accessed by anyone who qualifies for them (usually a base parameter value will be needed, such as "X INT needed to learn this spell"), anyone CAN do anything. HOWEVER that doesn't mean it is easy. A great deal of balancing ensures that attempting to build a character with features from multiples "class-like" styles is viable, but wont be as specialized as one who focuses on one style. (Jack of all trades, master of none)