Since I have a massive collection of miniatures that are both un-built and un-painted I threw this suggestion to my friend Chris: let's try a free form game of minis. I put forth that the only rules we start with are for points of units only based on the size. A small mini on a 10mm base was 1 point, a man sized mini on a 10mm was 2, a 20mm base was 4 and a 40mm base was 8 points. He brought an 5 man iron hands squad w/a Forge Father and a contemptor. I brought a gang of grots lead by a Runtherd. Among them was an ork w/a bionik eye and an anti-tank rifle and a squig hound. So we set up on a table of ruins and decided that the Space Marines were drawn by psychic presence of a grot-weird boy(which we decided was a grot who was clutching his head).
: 1,2 knocked down 3,4 Wounded 5,6 Down. This in turn was modified by how powerful we determined the weapon was or how tough/weak the target was.