How to get high vpm?

i am running gsa with 5 dedicated proxies and threads are at 50, and i am using 3 gmail accounts and captcha sniper success rate is 72.85%

How to i increase vpm? i am submitting to 1000 links and get 40 verified.

More proxies, more threads, better footprints/more carefully filtered linklists, and tweaking your max-page size and html-timeout settings will all increase your VPM.