I mentioned the Orks earlier: as well as the commando/commander switcheroo (where Spookums can swap positions with Bludflagg), their ranged specialist Nailbrain is ridiculous. I added a few heavy weapons squads to support my biggest gunner, and the occasional vehicle when I could afford it, then spent the rest of my money on upgrading and reviving my heroes. So for the most part, you slip into playing Retribution much as you did Dawn of War 2: four heroes, each with special abilities that mix with each other in excitingly brutal ways.