I understand that Claymore miner is done now, but using 1080 Ti cards with every other miner I get ~18MH/s instead of ~47MH/s if the DAG is over 4GB in benchmark modes (win 8.1). What am I missing? Linux works well so I'm guessing it's some driver or windows limitation? Is there a workaround?

I have not found anything about a masternode presale in your ANN which is a good thing in my book.
Good luck for your project.

This is a hilarous ANN.  It's a 0% premine that's announcing miners are "not welcome" and neither are other pools "because pools are competition."

So why even announce this project?  Looks like a private learning project and you don't even want people around.  Saying that in a BTC Ann is the equivalent of setting up a public lemonade stand, sitting at the stand with a sign saying "LEMONADE NOT FOR SALE THIS IS JUST A TEST, DON'T COME BY WE DON'T CARE."

Good luck with this project.