I once saw an interesting situation with Orc defenses... they used a hero and 600 Orc Warlords (those with shields) and positioned them near Liches. They had maxed out their readiness stat... and, by sheer luck (it usually doesn't work with high-level heroes), the Goblins took control. The opponent spent a long time figuring out what to use to defeat these Warlords. In the end, the Orcs won. It turns out that it's quite difficult to deal with these Warlords. They have Fury from the start, plus a bonus from the hero's attack, and they counter-attack first with double damage and gain even more Fury, dealing a lot of damage and wiping out many creatures, while the remaining ones don't do much damage to them.