1> It works for small mobs, but not for some big mobs if not dodged. That's a logic like some skill procs don't work on specific enemies eg repulse back don't work on dragon.

2> Can't totally recall but, as far as I can, that hat luck was specific for st. patty map only.

3> Maybe it was not intended, just is a bug so better not to get to exploited more, that been said, foxes should not have double dash on empty area.