Xenoblade Chronicles 3 Challenge Mode: Heroes Frontline
Definitely not optimal but it seems relatively fast so I'll post it for now. I know people are struggling relatively on this challenge so hopefully this will be of some help. Build description below.
Main DPS is Taion and Noah on Martial Artist. Troubadour will be able to spam Glittering Melody a lot which will allow them to make full use of Raging Force, which is an incredibly powerful art. Soulhacker provides power charge and crit up/crit plus to make damage even stronger. Lifesage and Signifer is just for more safety but tbh they probably aren't needed.
Gear shown at end. I have a lot of ideas on how to make this build a lot stronger already but I wanted to put this video out so I can show people my thinking so far.
Did not use lucky seven; i wanted a challenge :)