Now this one has a bit of a story behind it. I was browsing the CRF for 500 cpu robot, when I saw a mega plasma cruiser. The chassis reminded me a lot of a trailer. So I am thinking "It needs a tractor".
This tractor is towing a trailer with a big plasma cannon on top. If the trailer gets blown off, the tractor can still escape on its own to repair. And as we know Megaplasma are META in the current brawl so expect excellent results when you go plow the fields of battle with your artillery tractor. ;)