[EenKogNeeto]

Deadly smile called, it said you're wrong about guitar being the only on crit effect. (not the same exact thing, but it works with some REALLY odd things that you might not expect....like naga tail smacks)

Added that to the list, one of the weapons I didn't bother to test.
If anyone else wants to test something these are the unknowns currently.

Bow of Green Forest
Hikage and Tsuikage
Abberation Spear
Shizumare
Voidcut
Golgorth
Maniac Slasher
Rose Whip