I've been trying to complete Castrum Lacus Litore for the past 3 weeks with no success because it's been a challenge of itself in many ways. It seems like there are NOT many people interested in doing this Critical Engagement so the first challenge is finding one with sufficient players. I was able to get to the last boss with a group of 16 (the highest amount of attendees that I've seen) only to lose because we lack manpower and eventually ran out of time.

I suggest you update Castrum Lacus Litore into a raid format where players can queue up from the Duty Finder. It would save many people a lot of wasted time refreshing into Bzojan Front and waiting for the critical engagement.