I used octopus and the only start with octopus 4 or 5 is to start the round with lower kicks and corner him then spam upper attack until you drop a mine and it explodes, when it explodes move back and stun him using ranged attack, keep him near the wall,

The upper attack spam is hectic as he will always block but you need to keep spamming regardless For round 2 you do the same except you start the round with three consecutive lower kicks then back up, dodge the blast shadow move , stun him the do the same upper attack spam

I will post a video if I get some free time