Admob mediation Experts

I have a number of apps with Admob ads in them. At the moment I'm generating a relatively low CPM from these ads, as I'm just using the admob automated settings. I'm looking for someone to set up mediation within my admob account with other ad networks to optimise my CPM rate. I need this work documented, so that I am able to copy it for my other apps. As such, I require who ever takes this job to train me.