Plasma Cannon = worthless?

[Kaputnika]

best:
1. heavy cannon: huge range, effects many enemies around, just kills.
2. pulse emitter: perfect for wall-block-mazes, in a traffic jam it can effect 30 enemies at once. cool!
3. laser: i like how one ray can go through a loooong row of cars when you place it right!

worst:
1. machine gun: just a waste of space as you need so many. i need space for huge mazes and long paths! get out of my sight.
2. flame thrower: ya, nice. but really nothing special.
3. plasma cannon: yes you're right, it's expensive, it only hits one enemy at a time... but: its ground and air, and i just love how fast it kills in the beginning, when enemies are still weak! well it's a show-gun.