Right, so from my perspective our opponent has three things going for him: his ability to track his enemies via blood, the increased durability and flexibility his Earth/Water Release ninjutsu grants him, and his Blood Clones (NB: just like Shadow Clones). He also has knowledge of our Taijutsu skills, explosives skills/Sealing abilities, and Earth Release ninjutsu (read: MEW). From the knowledge that he has on us, and with the assumption that his ranged skills aren't well-developed enough to be a relevant threat in this match...I think his optimal strategy would be to obfuscate his actual location with Blood Clones and seek to swarm us with them, relying on his (and theirs) ninjutsu to dodge/tank explosives and the skill/difficulty in determining the real Kotsuzui to keep Hazou from defeating the actual one. If he's got HLaM or an equivalent he can just duck between a big rock, make clones, and go underground, letting the clones whittle us down while he moves in for a sneak kill. Having the bigger stick doesn't matter if we can't hit our enemies with said stick.