About 15m/s to eth-us.dwarfpool.com

Right now I point all of my hashing power to Ethermine. I'm in the US and host an Apache/NGINX cluster environment, so if you don't want to spin up another OVH instance I could host something here temporarily to at least trial it out (but I suspect your US server should be fine).

It's funny you mention this, because I literally just started researching coding up my own stratum proxy to do the same thing since Blissz paused development of the L3+ firmware.

I'm geting around ~80m/s ping to rigproxy and can test this out on a handful of my rigs. Would probably point ~350MH/s of Ethash and ~2.5GH/s of Scrypt towards it.