Diagnose causes of low site ad cpc

We have two sites running ads. Both have same niche.

Site A -
Has loads more posts
Has loads more backlinks
Spend more time optimizing
Hooked up with cloudflare
Has more traffic than site B

Site B -
Does not have the above things
Spend much less time on it
No CDN

We use same ad placements on both sites. Both sites get most traffic from US.

You need you to look at the main site and diagnose and help fix any issues that may be causing the ad cpc to be lower than site B. You need to good and know what to look for, you to identify anything causing lower CPC or a bad rep maybe. Good knowledge of Adsense is essential.

Overall goal is to improve ads cpc, if you help achieve this we will release full payment, other wise we can release partial payment dependent on work done upto 50%.

Not interested in any other kind of offers (cowboys know what I mean)