Might be interested in some data:
Min players 6, min teams 2, ZK version 0.8.x.
Unit stats for 356 games:
Used in 89 games; Cost damaged/lost 0,78;
List of top dmg. Left: dmg dealt, Right: dmg taken.
Recommended counters by efficiency:
MOBILE
Tarantula - AA Spider
Flail - AA Hover
Copperhead - Flak Tank
Jethro - AA Bot
Rapier - Skirmisher, AA Gunship
STATIC
Cobra - AA Flak Gun
Hacksaw - Long Range AA Missile Battery
Razor's Kiss - Hardened AA Laser (maybe microable - close when BD fires, open when BD reloads)
Stinger - High-Energy Laser Tower
Defender - Light Missile Tower
I was expecting Hacksaws to be efficient against hit and run units.
Funfact:
Krow has higher efficiency than any other mobile unit. Its stats were changed often, so this information is unreliable.