stupid bugs caused me to have slots filled even after i sell all my equipment. so when i try to use some ships i have to use less than even the starting 6 upgrade slots.
Loki really isn't too hard. if you basically circle the screen using Odin and Excalibur you can take him out because for some reason he doesn't seem to hit except when he occasionally runs into you or shoots you from right in front of where you're headed. But even then you could just change direction and go the other way. I beat him 2nd try with 99 shield, 64 energy, and 65 attack.
 "Enigmata"){kind=icon}
 "Cube Colossus"){kind=icon}