I have been using Burst for a while and recently got into ValueClick, just yesterday. I can't decide how to arrange my chain. Should Burst be at top followed by VC or vice versa. Also what is the eCPM cut-off you use for both? Any help will be appreciated.
Use theRubiconProject. Its a tool that will help you in this problem. They arrange the best paying ad at the time of the impression to be on top. http://rubiconproject.com