Ok for the record both Heavylocker and Extprotect have a serious flaw, during obfuscation the execute function action is not considered, corrupting any map with that type of action. Also for the record Vexorian's Map Optimizer is THE BEST, nothing surpasses it.
ALso Extprotect actually makes your map BIGGER (most of the time), not smaller.
The more 'imports' in your map the less any protector/optimizer will make it smaller. However With two 300 kb model imports Vexorian's map optimizer halved my map size.