On hit if hes standing your at like +8 advantage. Its a guaranteed 2,1,2 clone/2,2,4 clone or 2,1,4, clone. If hes ducking your not at as much advanatage(I think only +1) so I would just pump another D4 in there. If he blocks it you can D4 into clone. All of Nightwolfs strings move him forward so if he tries to go on the offensive he will run into the clone. Hence why D4 is so good against nightwolf. Even if he blocks it he basically has to stand there and take it over and over as going on the offensive could mean running into a clone.