As it stands now, there are a dozen or so basic steps that you MUST complete (not necessarily in any specific order) before starting a battle, otherwise it turns into an instant cluster-****. If you miss a step and go to the deployment screen, it's too late, and you need to start over from scratch.
Basically:
- Add your own force, either from a file, or by creating a force in the lobby.
- Add as many AI 'bots as needed for whatever opposing and allied contingents you need in your battle.
- Assign forces to those contingents, either by manual selection or from "Random Acquisition Tables".
- Set starting positions for each force, otherwise they're all going to get scrambled and placed on top of each other. I've missed this step far too often for my liking, especially since the AtB campaign settings for MekHQ often require being able to place units in the same deployment zone.
- Set any allied factions to the proper "sides", otherwise it becomes a free-for-all among all of the groups.
- Change the map to something larger than a postage stamp, otherwise you'll find your full Company of 'Mechs and the opposing side at point-blank range, fighting on a single random mapsheet (like a deep canyon, where Side 1 and Side 2 can't even reach each other).
- Set or randomize the skills of any contingent that should be other than Regular 4/5 skills across the board. (Note that after you randomize one faction's skills, and change to the next faction, the randomization settings will revert to "standardizing" the next unit back to 4/5, rather than retaining your choices to randomize the unit.)
- Adjust any rules changes that need to be set, or else fight with the default rules settings.
THEN you can start the battle, and hope that the random mapsheet selection is at least playable. It would be REALLY nice if these steps were either made clear with a checklist, stepped through in order to MAKE you at least review the settings without accidentally missing one, or some could be pre-set as a profile and remembered, so you don't need to remember every last step every time you fire up the game. At least for me, setup is the toughest part of the game, and the least rewarding.