"I don't think shooting down seekers gives very much experience, if any."
I set a fleet up to run out of supplies shortly into a battle against a bunch of missile boats. Main weapons wouldn't fire, but PDC did. They started with 0% exp, and the fleet had 50% legendary when the battle ended. No ship had more than 10% exp, though.

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The Unpronounceable Krsqk
"Well, sir, at the moment my left processor doesn't know what my right is doing." -
Freefall