For CRA we use hubud as our core drill. Though it is not sparring a such it can be done with stick, knife and empty hands and unites all the phases at this range and makes trapping functional as the range that sits between kb and grappling.
We currently practice the 9 CRA methods out of hubud:
lox
dumog
sweeps
tai chi
HKE
HIA
shime
tomate
kino
