Honestly my strategy won't sound that great cause I was just screwing around with a fight and got an IKO P1: In this phase I just countered two moves, then threw a super punch, repeated 'till he was knocked down. P2: Here it gets weird. I was trying the same thing, and I knocked him down at maybe between one if his jabs or something? But he went down and was IKO'd, so it all works out.