Alright I don't expect to win with this thing, but here it is, "The Black Crusader"
The Crusader was built just for this challenge. It sits at BB198,216, 47 MPH top speed, and ok handling. It's armaments consist of 1 Hawkeye Auto Cannon, 4 venture Roundabout Mortars, 3 Venture Avalanche Launchers, 2 Venture Oozee SMGs, 2 Venture Crossfire Rifles, and 2 Venture Hail Fire Rifles
Really tried to beat the bullet hell wall designs and failed, but this is the best I could to with a tank-like frame, I think.
Still quite a "brick of a tank" though lol (wink wink) Workshop Link also below.
TerraTech The Tech Sharing Workshop Share your favourite Tech designs with other players and discover what everyone is creating - armoured tanks, fast scout vehicles, cunning crafting bases, awesome aeroplanes and crazy creative builds.
if that doesn't work look in the workshop for "tank submission" by bhspencer (my steam name)