Damn that first mission! I've spent 2 SC farming/leveling Iron units to do it so far. But I plan on stowing them away in the barracks afterwards just in case they try this again in the future so I guess its an investment.

My plan is to run with a min cost level 25 team of 3 soldiers, 4 archers, 4 bandits, 3 heavies and 1 mage. If its too tough I can max them out to L30.