why crashing with daggers? because daggers are the most easily parried attack. more parried attacks means more changes for crashing to disarm which means more space to fire for damage + lag (str and wisdom).
why imperial? trip and dirt kick. more confusion, more opportunities of spam, more space hits to fire.
and i'm a big fan of dash. literally wait for them to flee and dash x underhand target. if they stack a command of flee;d;d or something, more space, more lag, chance to rinse/repeat on the dash.
and when you need, you got boneshatter, cranial, and drum in your back pocket for the normal builds you gotta fight like shaman, assassins, etc. if I was a sadist i'd maybe take dagger/polearm instead.