I'll describe the cannon as well as I can:
The plasma cannon feels like a recoiless cannon as it fires its plasma in a tightly concentrated blob, though it's still a cloud. It has a range of about 60 ls and has WMD 4 (on the 1-7 scale). It fires 3.8 shots per second.
It's level 10 and consumes 300MW, same as the Iocrym Fracture cannon and the Ares plasma archcannon.
The Fracture cannon is a fast, short ranged and a good station buster. The APA is a slow, very long ranged and a good station buster. But compared with these two weapons, Earth Industries' plasma cannon is average:
- It has a longer range than the Fracture, but not that much;
- Its firing rate and WMD rating are between the Fracture and APA. It appears to deal less damage per second than either;
- It only takes one slot, same as the Fracture
To increase its strength I suggest increasing the WMD of the EI plasma cannon, so that it's even better against capital ships and stations. Maybe increase its range a little more to ~80ls and/or increase its damage to to the point where it can kill a Sandstorm gunship with one good shot.