Digital Advertising - Real Time Bidder - DSP

I have been using digital advertising aution based / automated buying solutions for a few years now. Example would be Appnexus, Mediamath, TURN. From my experiences with these systems they all have their advantages and disadvantages and are all aimed at running automated buying campaigns for a wide variety of campaigns, from branding and DR, CPM to CPA. I want to build a DSP solution that will run very specific types of campaigns with a new workflow management solution for setting up campaigns and reporting.