Collision Budget maxed at half the piece budget

So I was working on a halo 2 style infection map today and my Collision budget hit 97% as soon as I put down 544 pieces. Is there anyway to fix this? Most of my pieces are phased, but I do have some cars that are fixed. there is also two soda cans on normal physics.
Unfortunately I don’t really have much I can say on this because this is the first time it has happened to me.

Here is a link to the image of my map and forge HUD ( I hope this can help explain it):
http://xboxclips.com/Thorrulf/screenshots/544d4e80-c072-4f32-8e4e-ace5b4fe4f19

The collision budget will fill up very quickly when merging a lot of pieces into each other.
Even if it’s only just a little bit.
Also, certain pieces may bring that meter up higher than other pieces.

Rocks will bring up the physics meter very quickly.
While it’s not the physics meter you’re concerned about, it’s an example of what I mean.

It would look to me that a lot of the pieces used to build you buildings on the left there are merged together slightly, but there are quite a bit.
Those may be your issue. You may want to try spacing them out.

I’ll have to try that then, thanks.