This one isn't a string per se, but I see people get hit with Poker Bluff K spam way more than I really should. If you block PB K, the only thing he can do at that point to hurt you is either PB K again and hope you're bad at punishing, or PB K and hope you stand up and do nothing. In most cases, they'll go for PB K. Anything that hits grounded will get him to stop kicking you in the shins, and I do mean "anything".