There are lots of things you can add the detail flag to - like bricks, stairs, supports, small bunkers, etc. After looking at the map, though, I see why vis had so much trouble. You have way too much detail all in the same area. Nothing really blocks visibility. I've attached a demo of things to revise and uploaded the map to the beta server.
Please don't use uppercase letters in your map filename, as some operating systems are case sensitive, and that causes nothing but problems. I've renamed it to paintballersdream_b1.bsp.