Finally tried this but on a friend's PC so I didn't take my time reading what skills did so (with easy mode disabled) I had an easy time spamming attacking through the oni and the witch boss.
The knight boss required some cheesing: I did jump attacks until I could trigger the execution thing.
Didn't attempt the vixen boss properly, she looks like that the first "l2p or die" boss.
I'll try playing this "properly" when I have the time.
The models look great and the waifubaiting is excellent, music is nice too.
Very nice, had fun.