Your fav dryland routines

I wanted to see about mixing up my gym days a bit so feel free to drop some nuggets. I do the Davies Ten shoulder routine for overhead sport athletes and it's served me well for a long time, but have been quite negligent of directly attacking my core and legs. That's what I'm mainly looking for here....some low back friendly core and leg routines that allow me to keep my posterior chain engaged with good back support. Thanks all....