Well, we finally managed to kill it...after 14 hours of battle. There were a few times when the online timer started again but we managed to pause it and at around 6.30 this morning it exploded and much joy was had on our side. The enemy even managed to lose a titan or two.
So how did we kill it even though we were outnumbered 3-1? Tactics won the day.
At the start of the fight my alliance decided to keep damaging the keepstar using simple battleships called Ravens. Ravens are able to hit things from a very long range and this makes them excellent for applying constant pressure onto structures. Before the fight even began our side had prepared a massive amount of warp in points around the Keepstar. You would select a random point, warp in, and fire.
The enemy had brought much bigger capital class ships as well as several other smaller ship fleets. They didn't quite expected us to be where we were in a giant ball around the Keepstar and so they had to reposition ships etc and this gave us time to constantly keep repositioning our ships while keeping up the fire.
This worked very well at the start but the enemy adapted to it and spread their forces out as well. This meant that a lot of us Raven pilots were dying and then having to reship and get back into system.
Goons meanwhile started to bridge in fleets as well so any shortfall in my allaince was made up for by their fleets. It was a bloody and slow battle but in the end through a combination of tactics and sheer bloody mindedness we got the win.