My opinion it's a worthwhile attempt in case of an overdose, but should only be tested WCS. THCV if ever found in concentration would probably be a good choice too. Than again with the synthetics they may not areas the natural compounds don't.
the now discontinued rimonabant, a CB receptor antagonist, does stop the effects quite quickly (it can be had from overseas but it's not exactly a widely marketed thing but is very good to have if experimenting with these drugs; unfortunately also it only comes in pill form; an injectable form would've been great to have in ERs during the height of the so called "k2" crisis)