With regards to JJ and grappling we usually do groundbud to establish mount and go from there - this takes the premise that the fight as gone to the ground and you start from there, with the opponent mounted on you
The next phase is to control the takedown so you are either in standing clinch already, as in Thai, dumog, or VG, or you shoot in and establish clinch
either way we will be examining this strategy where you choose to clinch, takedown, and establish mount, and go from there
apart from the actual td itself the entry and clinch and the newaza can all be practiced on the wood