the best ship (I think) is composed of atleast 10 cockpits in a square shape, each one increases cannon damage. Have half multidirectional guns, (blue) the rest straight shots. (orange) throw in draw, medal converter, one cost converter, formation change and cannon upgrade. you might have some left for auto-life. laser weapons ain't worth it. Kill bosses in seconds easily with this design. As for formation change, change form everytime you go berserk so the teeny ship icon on the HP thing is a blue arrow. This form in berserk makes the teeny ship move by itself seeking targets. In normal mode, use the orange one that makes the teeny fly around your ship in a circle.
And ofcourse you have to roll alot, unfortunately they made roll the circle button instead of square, which puts your hand in an awkward position. Dumbass programmers. >_< And the sample ship models unchange ain't gonna get the job done if ya feel like getting 100%.