Could not find any guides for MB so I just overpowered it. Got as far as NE 114
If you have a high DPS/Blitz build and high initiative you can overpower some of the ninja exams. I had 37k Power and Refine Levels between 5-6.
Just change talents and position as you see fit. Also sometimes Iruka is just there as sacrifice to take all of the damage, while Main and Mifune killing spree.