I find creating more niche or keyword related handles works best in the niche. I posted some info here of what I've done.
https://gfy.com/showpost.php?p=19262231&postcount=6
The best way I've been able to be successful is through constant posting on twitter. There are tools out there to help you automate this. I haven't fully dove into it yet to the extent that it could be very successful but yes and it works.