I have recently put together a comprehensive user guide for the Prometheus V2 Hot End! This guide outlines the trade-offs involved in configuring the Melt-Zone and Transition-Zone of the Prometheus and will help you get the most out of your hot end.
The Prometheus V2 (Beta) hot end is an optimized, simpler, and more professional version of the original Prometheus hot end. With the success of the Prometheus V1 and hundreds of happy users around the world, we have received a lot of feedback about our product. The goal with Prometheus V2 is to eliminate all of the quirks of V1 while further improving performance and user experience.