Which AEP certification is best for AEP ?

Hey @badlinewer 

There's a new exam which has replaced the one you are looking at.

Now you just need to pass one exam for developer expert level.

Here's the link: https://experienceleague.adobe.com/docs/certification/program/technical-certifications/rtcdp/rtcdp-expert/rtcdp-e-developer.html

If you are looking for just a business practitioner then that one remains the same.