I've tried both - or I should say, I was trying the "wide variety" theory & right now, I'm trying what I'd call the "top performers only" option, where I'm pulling a shitload of poor performing sites so that I can get the listings at a manageable amount while still pushing sites that have consistently performed.
The one problem I am currently having is with less popular niches, where there's only a handful of sites to promote anyway - I sorta have to leave the duds on the pages
