The Zeus panzermech was built to operate as a tank hunter in difficult terrain or to assist the Thor panzermechs in reaching their urban targets. Unsuited to the urban role, once the Thors were delivered to the target, the Zeus often protected the flanks of an assault, preventing enemy armour from cutting off the attacking forces’ lines of supply.
Whilst it's main purpose is being support and protecting flanks, it is nearly just as capable as the Thor panzermechs to be on the front. But, putting Thor and Zeus panzermechs together would even make the earth tremble.
Certainly being a tough nut to crack, you can place the Zeus into any combat situation and nearly guarantee it's survival. As perfect as it looks as a centre piece it also becomes the ideal distraction. So big and deadly your opponent will be avoiding it completely or throwing everything they have it at. Use that time to strike!