I say you should re-make the simplemulti pool concept using p2pool mining, now that they have shut down.
They do have an open source, let me see what I can do
https://bitcointalk.org/index.php?topic=904399.0
So I was able to successfully run simplemulti pool. I need to set up a currency server (for payouts), do a few edits and I believe it should be up and running. We'll see...