During my time doing UHC, I've tried coming up with the best settings for UHC servers, while still keep everything as natural as possible, and keeping the game play fun.
I recommend using paper-spigot, it's a more optimised a version of spigot and works pretty damn well with UHC:
Paper Spigot: https://yivesmirror.com/grab/paperspigot/PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar
For the server files, here are some of the more optimised settings I've used in previous servers (they may not be the best, but they work pretty damn well):
bukkit.yml - https://hastebin.com/xucuwabiyo.coffeescript
spigot.yml - https://hastebin.com/avegofipif.swift
paper.yml (if using paper spigot) - https://hastebin.com/himubozeqe.bash
I recommend using paper-spigot, it's a more optimised a version of spigot and works pretty damn well with UHC:
Paper Spigot: https://yivesmirror.com/grab/paperspigot/PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar
For the server files, here are some of the more optimised settings I've used in previous servers (they may not be the best, but they work pretty damn well):
bukkit.yml - https://hastebin.com/xucuwabiyo.coffeescript
spigot.yml - https://hastebin.com/avegofipif.swift
paper.yml (if using paper spigot) - https://hastebin.com/himubozeqe.bash
