Well, you could use the MDX Squisher. It compresses the models squished only when the map itself is compressed. Also, try lowering the quality of textures. You could do this by: Go to WarCraft 3 Viewer, Open the .BLP file & Convert to .BMP, Convert .BMP back to .BLP and erase the previous .BLP with around 75~50% quality/compression. Not much difference quality-wise.