Best I've got was a 120-ton-per-side max 4 unit tournament. I took a Grand Dragon, Locust, Stinger, and Wasp. The idea was simple; the Grand Dragon would be a brich wall people focused on to the exclusion of the three lights.
It worked pretty well. The Grand Dragon was usually too tough to kill before the lights pasted something, and from there things were in my favour.
The Stinger-3G really shone, though. Especially when he executed a 6-hex jump, landed right next to a pristine Grashopper (which missed its shots, having also jumped) and kicked it, causing the Grashopper to fall flat on its face, KO the pilot, and crit out the engine.
Things went down-hill for my opponent from there :P