I think 60% Proxies
and 40% Computer Specs
I have one RDP and try Eggcrack on it with Elite proxies with response less than 2 seconds with 50 threads
And get 20 attemps per second the after a while go to 10 attemps and finish with 5
One Question Thats the speedtest in a VPS? or RDP? Slow speed connection I get always more than 500mbps in download and upload