kinda late but, i think moncal COULD beat ISD. however it's not because it lacks shield hardpoints. that's why the ISD HAS fighter and bomber squadrons. This balances them and give a slightly different stategy between the rebels and empire. Do you attack with expendable fighters + bombers first? Or do you send massive fleets of capital ships to wipe out the threat once and for all?
As for taking out space stations, as long as you have a good number of anything, you could take a space station out with ease. I find them kinda TOO weak. I mean, there SPACE STATIONS! they hold thousands of fighters, bombers, and probably even dozens of capitals(the only reason capitals look bigger than space stions is because rescaling and all that stuff.) So i think they should have been given better credit. just my two cents...