the only thing i must say is that you could get the crotch with a 3 dm boom or more
but if help you mean for someone do it,there is a 4dm boom(PS tori2robot is my alt)
same advice as aways:
try to make clean and good hits(booms for example)
try it,man,people has been saying about it for alot of time.
obviously dont need to be an 5dm fkin boom,but try to make atleast 3 dms in one frame/hit
try what i have said: ghosting and speed hits
you put turnframes in 1,try to put at least in 5,and try to make the hit ghost and make those booms,the thing must hit the joints that you want to dismember during that ghost.