Optimus now works in Win10 using 361.75 driver
Good news everyone, after 6 months nvidia released 361.75 brings back optimus on windows 10 with eGPU setup. and it's offical support on eGPU right now.
Small offtopic
My 20€ eGPU adapter. Just a mPCIe to PCIe converter and a mPCIe extender. Same performance and without the rigid and bulky hdmi cable.