Internet speed for gaming is largely irrelevant once you get above 5-10 mbs, I expected my ping to drop when I doubled my ISP downstream speeds and tripled my upstream but it turns out nothing actually changed for me. So your 750mbs is pretty worthless for gaming.
I suggest you and everyone else check into how much bufferbloat you have and how to reduce it, because thats the major cause of erratic pings like what your clan constantly has.
http://www.dslreports.com/speedtest
A high speed Internet doesnt mean an accurate connection. Left on ISP defaults they just opt for full blast with no control like a firehose but you can tune your routers to provide a better experience for everyone.