This is the tank I made after completing the game, with 12 Gun Points. Its name is Wraith.
It has two 5-Spread guns, a Leech Cannon, and a Shield. The 5-Spread guns are mainly for swatting down enemy seekers and smaller tanks, while the Leech Cannon is for main damage and healing. This tank is extremely small and extremely fast, so it can dodge most attacks; even if you can't dodge, there is still Shield. You will immediately heal back if you somehow take damage.
This tank is made using 12 gun points, its name is Crescent Death.
It uses three massive cannons, one in the middle and two pointed towards the center. It also uses three auto cannons as support for while the "main cannon" is charging. A hit from the main cannon is 300 at once, a kill shot for all but the toughest tanks. Also, the three blasts go off in three different directions to one shot any small spread out tanks. It is a level 6, and the key is constantly moving forward to pick up the blue orbs and position the huge main gun.