
Here my suggestion, make four BO, for every Realm make one on the side near the respawn and one other in front of the middle barrack.
I think we have to try to keep the most as possible the spirit of this scenario with his large area.
I try to place less as possible BO and in specifics places (crossing, safe place with wall for def/small scale...) to make all way interesting for flanking, ambush...
You need THREE Objectives only to lock the middle barrack and win points.

Feel free to redisign my suggestion if you think there is something interesting.