like some of you said, the colossus was never meant to engage sathanas juggernauts, and the colossus is very INEFFECTIVE against the juggernauts. a sathanas with the 4 beams fully functioning will tear the colossus to shreds in seconds, and i have tried it with FRED2.
but, the colossus wasnt weak **** either, it was VERY strong and VERY effective against other ship classes. it rips shivan crusiers and destroyers to bits. i tried a scenario in FRED2 where the colossus is surrounded by 4 deimos class corvettes and 2 Orion destroyers, and yes, surrounded. i also made a small fleet consisting of 6 aeolus class cruisers, 4 deimos class corvettes, an Orion, and an iceni ship move in to attack the colossus as a reinforcement fleet for the current attacking ones surrounding the colossus. the colossus destroyed the surrounding corvettes and destroyers and destroyed the reinforcement fleet. the colossus however does suffer a lot of damage because they were a lot of ships, but it survived with around 20 hull integrity left.