if you want an overpowered tank: as soon as you get a leech cannon, add just 1 shield (secondary weapons) and the leech cannon; when u can afford 2x leech cannon use that, and only that, then as u get more gun points, use 2x leech 1x shield, and ultimately, 3x leech, which is the best tank possible. Also, and this applies to every cannon i descibed, resive every piece to be as small as possible, then u're harder to hit. DO NOT use any bubbles for your body, they are useless