Been playing Pat extensively the past few days and have found an unblockable set up that works nearly every time I pull it out. Not sure if it's been just dumb luck, but I created an account just to post this because I can't recommend this set up enough. XD
Immediately after a 44KK that hits, follow up with 44B+K.
The second kick of 44KK generally surprises the opponent and hits em, causing a knockdown. At this point the opponent has several ways of avoiding the unblockable such as staying on the ground, rolling any direction besides forward, and ukemis to the right or left. Despite this, however, something about the crumple effect on that kick makes every person I fight get impatient and press G to immediately spring up and be greeted by a face full of flaming justice. I can literally perform this set up multiple times in a single round and my opponents seldom ever catch on.
Definitely give this a try and let me know how well it works for you guys. Again I could just be getting lucky with my opponents, but I have easily pulled this out against B's in ranked to secure wins.