When using Overlords against Overlords, make sure mix all your units, Heavy Tanks, Artillery, Heli and lots Infantry.
After Armory, Chain Tank is very powerful to against group of tanks, They can destroy Heavy Tank group very easy, also can stun vehicle.
Overlords is good at face to face your opponent, but hit and run is also important, another thing is Tank and Heavy Tank can crush infantry, so use your Tank and Heavy Tank crush opponent's infantry, lots infantry still can do serious damage.
To attack, can use Transporter, Air Transporter, Para Cannon, if can use different move will be nice.
To Air Transporter, can use lots Vehicle+Infantry landing, or 6 Commando to surprised your opponent.
But make sure do everything quick, when your opponent build lots Radar, means your opponent knows all of your plan, so make sure act fast, or destroy opponent's Radar fast.
