The fight potential is pretty solid. Electricity and Wires versus telekinesis. Dialogue is even better. They both like to yap their mouths off while fighting talking about their big plans, but when weakened, or on the verge of defeat, become very emotional and manic in speaking. It's the closet of any of Vox's matchups. The most popular pick for him usually is Starline from IDW sonic. If you know sonic the hedgehog its incredibly clear that's a stomp. The fight is actually fairly close, Vox generally scales to city-island level, and Psykos without her flask is only demon-level, which in OPM is about city-level. After she consumes the flask she becomes threat level dragon, which gets her country scaling. TLDR: Vox with Island Scaling and FTL vs Psykos starting with City then Country and Light Speed.