4P+K is the one you want. And 7K is for knocking the AI away so you can continue with the 4P+K
7P, 8K (as the game lists it; 7K does the same thing) is awesome on the AI! Use 7K or 4P+K to create distance, back up into ongyoin/fumon stance with 7P, then teleport kick with 7K. Repeat 7P,7K until one of you is near a corner and switch back to either of the first two moves.
With all the distance between you, you can usually just watch the AI whiff an attack or hold to try and goad you then teleport kick from safety since it'll take you to wherever they are. I had a MUCH easier time with that than trying to only time charge attacks.
I really should learn people by their usernames instead of signatures. The world needs more Cissnei!