Ad Revenue Optimization

[jsttn]

Hello,

I have placed a banner on the bottom of a screen in my iPhone application. After doing thorough research I would like to hear some thoughts as to what I am doing and how I should improve. From what I understand their is a huge debate as to which ad network is the best and the simply none. Thus many developers use what is called a "mediation" server to optimize the ads presented to the user. From what I have read, iAds have the highest eCPM but the lowest fill rate. Thus it is necessary to add an additional ad network to optimize revenue. So my current setup is using Adwhirl, I have iAds dedicated as my primary ad network with Admob as a backfill. So is this a good setup or should I use more ad networks to guarantee a 100% fill rate? Also are these the ad networks which will give me the most revenue? Any feedback would be appreciated.

Thanks!