Please never do this! Read this thread from the developer of uBlock Origin. Using multiple content blockers together like this can and will cause issues, as well as will increase fingerprinting, etc, and there’s no gain or benefit at all from doing so.

I would disable Brave’s built-in ad/tracker blocking (leave the rest of the Shields’ functionality enabled), and would solely use uBlock Origin, and remove the other extensions. (You could even just stick to Brave’s built in ad/tracker blocking if you want to, but I just prefer uBlock Origin for its advanced features and compatibility)

As far as Decentraleyes goes, its essentially abandoned. You can use LocalCDN instead if you wish to do so, though its privacy benefits are debated. I mainly use it since I use uBlock Origin in Hard mode (which it complements uBo very nicely in both Medium or Hard Mode), and for the performance boost it gives, but its up to you. Ghostery and DDG Essentials should definitely be removed. (While DDG Essentials isn’t only content blocking, its other features are also just completely redundant and unnecessary with Brave)