Random note of interest: Shippu can cause your 360s to whiff off of GF, but not 720. 5A still stuffs it though. Not trying to suggest anything off of it just pointing out a neat fact.
Shippu is a very dangerous move in neutral play as well, because he can use it on reaction to stop himself sliding towards you (he can't be moved while charging Shippu).
i.e. Tager trying to do the j.D whiff > land 720 at medium-close range. Or just about anytime you try to do a 5D within magnetism range (although this is practically suicide against Hakumen because it's piss easy to react with 6D to any of Tager's Ds)
Other random note: Be careful about 5A'ing an 8-star Hakumen, he can turn 6D into 7.5k+ with 8 stars.
Regarding more realistic things:
I don't recommend 5B at the beginning of the round. Yes it does clash with Haku 3c, but that's just it: it clashes, it doesn't win. All it will do is force you into a game of chicken you can't win.