You dont need to fulltime hachiman hands to accomplish a 5-hit build... Here is my post from the GK page
In my opinion it will be the new standard weapon of choice for the not so elite Sam. It is not difficult to obtain, and it is also very inexpensive to get a 5 hit build with. Which should be able to compete with the Sams who have the time/resources to obtain Masamune.
Dmg 91 with 464 delay
5 Hit build
Trait 25
Merit 10
Weapon 5
Rose Strap 4
Brutal Ear 1
Rajas 5
Usu Feet 7
Askar Body 5
Food Carbonara 6
Hachiman Kote 8 (if you fighting things that require acc in place of askar body)
This gives you 20.4 (20.8)tp per round which also give the flexibility to have good WS gear on for that Round. If you have /drg slap on that wyvern earring and your set to pound that *** with 21% haste and a 5 hit build with a 91Dmg GK... Not too damn shabby!
Also 5-hit wins for DoT period! Hagun stands no chance.