Just beat it with the undead, was a lot of fun =)
As for giant trolls, those are easy, just avoid them and when they are churning out trolls, you churn out scouts, cause your guys produce faster and are just as speedy =)
I should go back and rate the other episodes but this, despite its simplicity, is a neat little thing. I could see this being very useful in schools and if you haven't considered it, you might think about presenting to your local elementary school =)
 "Mytheria"){kind=icon}
 "Inquisitive Dave"){kind=icon}
 "Warlords: Call to Arms"){kind=icon}
 "Understanding Games: Episode 3"){kind=icon}