I just ordered a Sonnet eGFX Breakaway Box, and a Radeon Pro WX9100.
System:
MBP 15, 2018
i9 2.9GHz Processor
32 GB 2400 MHz DDR4 Ram
Mojave OS
I am working on an LG Ultrawide 34"
I will let you know how it goes with C4D R20 Studio and Vectorworks 2019 Designer SP2