Welcome to the forum!
GnP drills are usually best with 2 ppl. But what you can do is 15 to 30 second int. switching between the different mounts...(full, side, north south) set a clock and go at it 3-3 min rounds or 5-5 min rounds. Like I said its better with another person there keeping you off balance. Ala bucking rolling or pulling you off the bag. its a lot different throwing a punch when right when you throw it the guy bucks
Credit to M.C !!