SEO YOAST GURU

We looking for a SEO guru who specialises in YOAST. I have a customer who has been using the free YOAST WORDPRESS Plugin for a few years and we have looked closely at his SEO and are still not getting much joy. We have now purchased the Premium version of YOAST and want a more detailed look at its functionality and whether we can boost his SEO. For now, we are looking at £60 for at least 2 - 3 hours of analysis and plugin tweaking with the new Premium version and a detailed report on its findings and any issues he may have with his SEO. The customer is happy to re-look this on a regular basis so there could be regular funding for ongoing analysis, action and reporting. Please, seriously, ONLY respond if you know YOAST inside and out. Thanks.