This would be a good time for your staff to sit down and do some serious brainstorming on what you want to do and where you want to go. The fact that you lost half of the space is in good part due to bad tactical decisions of previous staff. Perhaps your worst decision was to move the capital from Chazwa.
I would strongly advise you consider the following
a)pick a capital in the middle of your cloud and reenforce it.
b)build a series of defense outposts along the line with OS(yes, build a wall #MakeRepublicGreatAgain)
c)work with you allies, GA and SSC. We had a campaign before, the Anti-Sith league, but previous staff did not want to join officialy. Bad call. Perhaps this is even more important now.
d)gear, gear, gear
However, there are two things in motion that do help GR
a)Mandalorians are now east of OS cloud. Mandos are far less benevolent than GR.
b)The Triumvirate emerges. Axis of power will change in OS in due time, which may cause inner strife.
If you want help, I always fancied a political character. I'd make one if we will play sensibly and wisely, with our egos sublimed.