OK - now that I'm on the Stranded mission (snowy mountains, not much Ag), I take it all back.  This mission is kicking my butt.  Since the Ag is limited and I need to build so many missile towers and laser turrets, I have to either throw everything into tanks/quadwalkers or soldiers.  So far, I don't get too far with either one.  Any time I get a decent sized group of attackers together to try to take out a turret, they end up getting spanked by a horde of planes and tanks, which then proceed to mow down my base.  Then there's not enough Argentum around to make a second try.  Oh well, I'll work it out eventually. 
