A slow but durable tank.
Offense: These things have just about the highest armor of any unit in the game but they are also about the slowest unit. It is best to get them as highly leveled as you can and let them lead the assault since they can take a long time to kill when fully promoted. Their gun is also very deadly to recon units and tanks too. It definitely takes skill to get them in at the right moment since most of your units will race past them if you deploy them too close together. Always support with anti air units if your enemy has helicopters.
Defense: They have no air defense so use helicopters. They are very slow so if the enemy isn't pressing you save up enough resources to deploy 3 or 4 of your heaviest hitters to gang up on one of these tanks. Strong rare or super rare infantry are good against them especially the Hastatus sniper that can get a few shots in before it closes. At close range this tank can kill your infantry so rocket squads are good since it will take 3 shots to kill them. Plan on using several units to bring these down. If you have collective struggle, they can destroy this unit because they have a health and do a lot of damage.
Variant Specialty Edit
This is the cheapest variant by a considerable margin. It has lower stats than the other variants to compensate.