Oh... my god.
I feel like such a fucking idiot.
The reason why
proxifier wasn't letting it pass test 2
vindi wasn't letting me log in
none of my proxies were "working" to begin with
Is because I was using SOCKS5 INSTEAD OF HTTPS - like it specified on the fucking FRONT PAGE.
So fucking stupid. So so fucking stupid. So so so fucking stupid. Can't help but laugh.
Logged in Vindi successfully, all proxies are good to go. Speed is excellent. I appreciate all your help, 408, as well as everyone else in the previous thread.