Final Marcus SUPERBOSS #1 - Xenoblade Chronicles Definitive Edition
A fight with the easiest superboss in Xenoblade Chronicles: Final Marcus
Chapters:
00:00 Actual fight
01:40 Party build
After defeating him I can see how people used toargue whether he actually is a superboss or not. The fact that he's only lvl 100 definitely makes him considerably easier than the others.
Details
NG (no Monado III)
No Topple-locking
All lvl 10 arts (no lvl 12 arts)
Linked Skills similar to those shown by Enel in his character guides. They are not perfect (since I only have 255 affinity coins after defeating all superbosses), but they work well.
Gems setup isn't perfect either: you could ditch those strength gems to apply other useful buffs (perhaps by having Glory Gauntlets and thus removing Haste VI from the weapon), but I'd say you don't need much help aside from Spike Defence to defeat Final Marcus.
Advice
I honestly don't think Final Marcus needs much preparation. If you are level 99 and have a bit of spike defence, you can easily beat him. If you're having a hard time make sure to use Monado Armor to minimize damage received.