where is 22b > 66c listed? if you mean 2b (the slide kick thing) > 6c I just immediately mash 6c once I hit confirm the 2b. If you mean 22b > 22bbc > 66c, I hit them with the 22b wait until she stops and then input the 22bbc, which is where you hit b twice, but instead of going pressing 22c just hit c after the 2nd b and the opponent will pop up as if hit with a 22c. Then after I see the body fly up, I input dash until I'm close enough where 6c hits. keep holding the dash button and press c.
sorry if thats not what you were looking for, it's kind of hard for me to put into words, I also couldnt find any 22b > 66c