[PLEASE HELP] System freeze on eGPU dependent app (RX 480, akitio thunder2, 400w SFX, mba 2015, mojave)  

Whenever I start an app that prefers the external gpu, it takes a second, then the egpu screen goes blank and the main screen of the laptop stutters and flashes, it goes away when I unplug. Setup is as follows:
Macbook air 2015 (i5, 4gb, 256gb, mojave, 2015MBPr is on the way)
RX 480 (shortened, tested on PC)
Akitio Thunder2 with power mods
Silverstone SFX 400w psu powering both the dock and the gpu
HDMI display out
Purge wrangler script for setup

Thanks!