Hi ^^
Well at the beginning i had similar problems but after a lot of practice u ll get it done.
There were a few things i had ti take care of to get it done properly.
There might be the same problems in your execution.
1.Be sure when you want to cancel the shadow kick that you hold down 4 until you dash out of the kick.
2.Find the canceble frames of 113 which is actually not that hard since it can be canceled in a large amount of frames.
Id recommend to cancel it at the end of the animation of 113.
Same with b34
Sometimes it is just a matter of timing. When i attended an offline event i suddenly had to struggle with the cancel for a few moments. Then i got it .
A good way to practice the cancel is as follows.
1.Go to practice mode
2.Choose johnny a list
3.try to do b34 xx shadow kick xx run cancel, 11
4. The hit counter should say 4 hit combo
5.Try it as long as you get it down constantly.
To run cancel just hold 4 after the shadow kick , dash out, and press block to run cancel
it helps you can pm me if you have more questions^^