Anyone still well into this? I'm currently nearing the end of my warrior runthrough and feeling quietly confident about the highest difficulty. I'm yet to buy an item from the store, just surviving off of the items scattered around the levels (and often have to leave some behind as my inventory is full) so i'd say that means i'm pretty much whooping ninja warrior.
Oh and, for anyone struggling, don't overlook the tonfa, i did on my first runthrough on the easiest difficulty as they looked pants. Turns out they're pretty much the best weapon in the game; I managed an over 200-hit combo with them, it was carnage. Their limb removal rate is just insane.