I call bullshit on those flashback sequences. According to them, their master told them to give their all to kill the rising stars of the unification and ONLY IF THEY ARE DEFEATED to give their enemies their blessings, but in the present, instead of giving it their all both Gyou'Un and his friend pretty much commited suicide against Shin and Ouhon once they realized who they were dealing with. If Gyou'Un was serious about defeating the wounded and weakened Ouhon, he would have actually used his TEN SPEARS (Trademark) to help him like he did in their first fight when he didn't know Ouhon and beat him spectacularly. Or his strategist friend who, instead of trying to escape and regroup like he should have, rode out to face the pursuing Shin.