Very nice mission, well thought. That would be perfect if the arrival conditions of Sigma II were according to the creator's will ;) (it should come once the ISD arrives, the Imperial one, not the IFF5 one)
This battle has been mainly converted from the TIE version, I hardly had time to improve it at that time... expect a refreshed version of this battle soon. UPDATE: the updated version has been submitted to the TAC... wait a bit before the new version is uploaded...