The most important thing that people forget, these days, is fully fledged mobile version of their site, which as of late 2014, is an absolute must.
The best way to go is to combine it with ads from
Bitter Strawberry or
Sex Goes Mobile, and also consider a mobile popunder from
Plugrush.
Some other mobile networks, include
First Mobile Cash, and
VPS Mobile, and they may turn out generating better results on your websites, as they are more specialized.