NEVER, make statues solid if you plan on using radiant.
Even though its not going to be affected by lightmaps, make the statues to a model and load its elu with the xml later.
Just eats up brushs and later lightmap space, multiple light bitmaps are the cause of blackholes
(there are also whiteholes although ive been the only one experiencing them with radiant/fsrad?)
Use as less brushs as possible, dont have intersecting brushes, dont use bigger textures than 512x512.
Ive experienced some texture loading and display errors when using to many 1024x1024 textures, hence why you shouldnt go over 512x512.
(also be sure to make the texture a power of two size if the texture is not, gunz can display other resolutions but it can create some lag)
(
Article on katsbits about textures power of two)