Well, that doesn't sound like a very practical combo in the first place. Replacing the 236a after the TK with a 2c would be better, because you can follow it up with better things like air combo or Nero summon oki. Plus, the ground 236a sounds like it's quite a tight link and prorates badly. If you really want to do that EX before the AD, it would be better to do it after an air combo, ie:
2a (5b) 2b 2c tk236a 2c 6c 22a sj8 jc djc j236c land AD
This is the one most people use and is relatively easy to land. Of course, you can tone the difficulty down by not doing the tk236a and going straight to the air combo. Or, if you are at the very end of Max or Heat mode, forget going into air combo and instead straight away go to 6c -> AD.
If you're in the corner, you can try to doing bla bla 236c 2c 6c AD.
In general, doing AD right after 236c is not very possible.