My DarkWraith Build for Gravelord based events. I like to use it as a wildcard that helps the host since it can handle itself nicely for long fights.
It's best to keep a low end catalyst and a talisman for extended fights and fun. Has decent poise and can use roll to stagger low poise opponents. Crossbow allows you to finish off opponents who try to run. Poison resin works best since people like to try and block. This build can be modified with the Demon great hammer and chaos shotel to really punish those heavier than you.