Depends on the strategy you're running. If you have to be mobile I'd recommend running ARamos and the Mech Rider, Union Minners can be fun here too. If you've got something like Holdout or Supply Wagon, a gunsmith or 2 wouldn't hurt, Lazerus(an Outcast mercanary) would be useful if you know you're up aganst a guild crew. Willie can be a ton of fun to take here as well. If you need to be very Killy ARamos, Kaeris, and the Rail Golem are great pieces to take. I'm a sucker for taking the Steamborg Executioner here as well, but the Rail Golem really does a better job, especially if your running Kaeris.