Here is the thing, the level already has a lot of objects its going to be VERY hard to keep it at under 10,000 objects, so what I'm working on is optimizing, I know how to do it, I just hate it, not because its hard, but because you lose quality. If I changed all the 20m long bushes to 50m, it would really help in the objects department, but with that, you need to flatten out terrain, so it looks less like a smooth hill, and more like a sharp unnatural hill.
With so many objects and ambients, it wouldn't work well online, and with the size of the level, its really a 128 player size level. Coop is out of the question because its a complex style level that they wouldn't be able to figure out.
1x1km is hardly a large map, certainly not for 128. But where can you see the number of objects?