Some days I wish one existed. I'm personally not a heavy Discord-user and don't know about the specifics of making a server. But I'd join if there was some Discord for Warriors/Musou-games -runs.

Me and a few other people discuss runs here: https://discord.gg/82pQkGY . Been meaning to get you in for awhile, actually. A speedrun specific channel was just made.

Official Warriors speedrunning Discord: https://discord.gg/b2JkmdF