Hashi is the best vs 9 tails or any other summon for a barrier ninja. His bonus vs summons cannot be ignored
I would think you should be able to deal significant damage with pose, shield and lee/wind blade. With main using the 2x attack mystery, lee will be hitting 9 tails for 4x under shield and at max health. WB should probably be better than iruka since your main has a passive that can start off with shield right? (cant recall the opportunity cost of using this, but it might be the same line as strong armor which you dont need)
Of course the chakra cost seems a bit awkward, so you can play around to maximise it.