[chrispedersen]

well, I will sometimes give my commanders bloodslaves. Takes hits for arrows and can provide an emergency screening force.

bring the slaves on a scout, distribute them when you face cav.

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secondly, if you attack a province with a scout, you can see the cav setup, and alter your setup accordingly.
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Lastly, build a small screen of indy troops in addition to your giants. Don't send them in to combat.. just guard commander.