The best strategy to fight a queen is really to not fight it at all. You may get lucky, but nine times out of ten your sword will bounce off and it will kill you. I've found that the only surefire way of disposing one is to deploy a turret, and hope it kills the queen before it kills you.
It'd be nice if we got paid a bit more at the end of every assault, just to help out with the repairs and replacements. Plus, why is it cheaper to disband a unit and buy the better one than it is to upgrade it?
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