So here is the fight against Golden Optomon.
Could not find anything better than fire fireballs at him. Also used a trick with multiple EE shots to get some health. If you don't know that trick might be usefull for you to know.
http://www.youtube.com/watch?v=sZmU7YvZYuI
If anyone knows better way to beat him let me know! :redlander:
once fireball reaches level 2 its the ultimate secondary for most of the game because it cuts projectiles. figuring out how to get the required upgreade for it was the challenge here