Thought this would be a interesting video by a techtuber since the idea of running a mac with external graphic card enclosures has been brought up multiple times.
https://www.youtube.com/watch?v=SeGWwziCrpw
In terms of video games "3d" rendering it doesn't seem like you would be getting all your money out of the external card. While better then the gpu that comes in a mac it still seems a internal gpu in a gaming machine is far stronger.
Of course its video games and not Resolume benchmarks.
I don't use a laptop with Resolume but if I did I have to agree with him if I was using a laptop / notebook / desktop resplacement as a serious machine for Resolume. I don't see the benefit of carrying around a giant box in addition to a notebook that needs to be plugged in the wall just like a monster gaming laptop with a 1080gtx in it. And then not even get the full power of the 1080 out of it for basically the same cost.