I had a little mess about in the editor.
Pitting the Sobek against two basestars at first, with an additional 4 attacking after 2 minutes from all sides.
There were, I think 8 wings of Vipers (With a couple of waves launched from the Sobek if destroyed) plus two wings of raptors against 8 wings of cylon raiders + the two first basestars, with several waves set.
I fled to watch from a distance, as it was pretty easy to die. I found that most of my viper wings were wiped out, but the Sobek performed amazingly well. It was mostly an exercise to see how many basestars the Sobek could fight against.
It nearly destroyed 4 of the 6 basestars before suddenly, not sure what it was, but they found a blindspot or something. All the basestars launched missiles, hammering the Sobek into submission. It lasted a very long time before that happened though.
I'd like to add, I loved the campaign missions. Not to mention, it feels awesome to watch and fly around the Battlestar in combat, it just looks amazing.