Chanaise - confirmed your move, if you switch to ST and keep shooting you can eventually kill the metal meteorite and will get a 3 mill token for your trouble. The first time I got a 3 mill token though there was no meteorite so I've no idea of the other trigger unless it's also available randomly
Was incredibly easy, the end not even a slight challenge. I just used 25 Samurai (set to will), waited until they were in range of the closest enemy unit and then used freeze. I changed the line to hold at the end by the lightning bolt generators and, once they were dead, changed them back to will for the finish. The boss was only a little harder; 2 waves of samurai were needed.