I have to go with batriders. First off their cheap. They can be made tier 2. Their incredible anti -air and they are so unbeliveably good as an unexpected attack. You can easly sneak two beastiers in the back of your base. Plus with the orc you dont even have to worry about your base. You can take out seige weapons with a crap orc army, all you need is scroll of speed and just turtle like hell.
Second mass kodos. Just because its funny as fuck to go to the enemies base with 10 and gobble up druids of the claw form and run the hell out of their
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