I have small tip for you. You should try to make few simple maps, because at the moment you are good mapper, but you're tryin' to make super-extra-mega map, it's not the way in mapping. I remember many good mappers who make maps like yours and when they started to map small, EASY-SIMPLE maps, they mapping-level increased and your mapping-level will do the same.
Remember my tips. Just try to do small, nice but simple maps and it will be the way to success, really.