PoE oddly enough does use TCP for all of its netcode, its somewhat unique in this way compared to similar titles. I know they use a few different outgoing ports

PoE oddly enough does use TCP for all of its netcode, its somewhat unique in this way compared to similar titles. I know they use a few different outgoing ports so its possible they deal with head-of-line blocking issues with parallel streams (not sure about that, just conjecture).