High-Level AMZ ads training?

I’m looking for some additional training to improve my portfolio’s performance. I currently have around 30-35 clients all with multiple campaigns that I manage each month and not only does it take me forever to go and optimize each campaign/ad group/keyword, but I also think I may be missing some big-picture strategies on running them as a whole. I understand this is a super specific question, but does anyone know of some experts in the field or anyone who has an online course or seminar who has experience running 30+ clients campaigns at one time?

Any insight would be appreciated!