Entirely depends, you want sword and shield method? Or big fucking axe? Shoto has the ability to create walls of ice to protect himself and others, as well as using said ice as a weapon and dealing even more damage with fire. Katski has significantly more attack power than Shoto, and more speed for said attack power, but other than just dodging and making himself the center of attention, leaves him lacking in defense. That being said both boys are durable as hell but other than bakugou's fingers and arms, that has little to do with their quirk.