Go with the 8 or 10-Core and the Vega 64 and 128gb RAM if money money is no issue. 14 and 18 Core are wasted money with Adobe Products...
I've actually been using the RenderGarden plugin for a few months now and I have to say the more cores you can get, the better:
https://www.mekajiki.com/rendergarden
It has excellent tutorial videos to get you going. Basically it lets you run as many instances of AErenderer (called Gardeners) as you want, though the plugin's creator recommends no more than the physical number of cores in your CPU. So my 2015 MacBook Pro with 4 cores can run 4 Gardeners at a time. This is waaaaaaay faster than doing Ae's native multi-machine rendering option with networked computers.
Put it this way: if it takes AE 1 second to render a frame (almost never, but just for purposes of explanation), then having 4 Gardeners going at once gets me 4 frames each second instead of AE's natively rendered 1 frame/sec.
It also lets you divide your Ae comp into as many "seeds" or bits as you want, and each Gardener looks in a "Seed Bank" folder and constantly renders all the seeds until they're complete, then AUTOMAGICALLY stitches the seeds' video segments into the main video for you. So you have 8 seeds? RenderGarden will render 8 movie files, then stitch them together into 1 master movie file, then generate a log telling how long it all took.
Not to mention you can network render easily. I currently connect my 8-core Mac Mini to my 4-core MacBook Pro via ethernet, then share with my Mac Mini my MacBook Pro's "Seed Bank" folder, create as many Gardeners on each machine as they each have cores and point them to the location of the "Seed Bank" folder, then tell Ae on my MacBook Pro to create the seeds and let 'er rip.
I've learned that it's best to have your slower machine (in my case, my 4-year-old MacBook Pro) launch the render job, so that the faster machine (my two-month-old Mac Mini) is not hosting the "Seed Bank" folder. I do have the host machine (laptop) running Gardners too, though.
One note: this works best for long comps, because it takes about 15-20 seconds for each Gardener to start up the AErenderer, look in the Seed Bank folder, find the next seed to render, and start rendering. But when you have a complicated composition in Ae that takes 13 hours to render on just my 8-core Mac Mini with 8 Gardeners going, it's awesome to add my laptop's 4 cores/Gardeners and bring the render time down a bit.
Imagine how fast you can render a 13-hour job with 8 cores, networked to an additional computer with 18 more cores (26 instances of AErenderer running simultaneously)? As in our 1 frame/sec Ae render speed example above, you'd be rendering 26 frames/sec. Bam. So more cores is actually better in this case (using RenderGarden). Try it out, it's only $99 I think and has changed my motion design life, but I'm mostly working in Ae with only occasional Pr or Ps or Ai work thrown in.
