When testing landers and then testing offers with the best lander how should the bid be managed.
In my current camps I've gone with a high bid on all of the rounds of testing, so hopefully this rules out the traffic being crap. I try to be in the top 3 maybe 4 in the bidding placement but it's costing me a lot more than the general consensus of bidding just above average I've read in a lot of threads. In my current camp GEO 3 x the average bid is putting me around 4th.
My overall plan was to do all the rounds of testing cutting landers and offers on a high bid then once I find something that works test a Low, Med and High bid on the funnel.
Your plan to test everything with a high bid, find what works and then test bid levels is the fastest way to test - but it will also cost you the most in test budget. So if budget isn't as much of an issue and the speed of testing is important to you, then go with that method.
The method of using the average bid or average bid x 1.5x is to give a fair bid for the campaign without bidding so low you get only the junk traffic. It's a more conservative method if someone is limited on budget but it also will take longer to test and then you will need to test staggered bids at a later point also.
Andrew