If Ken play safe, just rush him down, cause Ken have not good defense. If Ken use fireballs, just recognice the pattern and rush him down too. You cant make pressure with Ken and you dont have variety-gameplay with Ken. Kens basic performance is weak and his offensive weapons are risky, which means, Kens offensive is also weak. The only way to play Ken is "reactive". But you can play every character reactive, cause its the last option you have.