Xenoblade 2 thoughts (no spoilers)

[Neodegenerate]

curl-6 said:

Neodegenerate said:

Use Mythra and equip a diamond accessory, a modern medal (or avant garde if you have it) and give her aux cores for Crit Chance V and Arts Heal V.  This with Rex will give you constant healing.  Also use Narcipear Jelly and the Plumber Game for pouch items.

Seal his abilities quick, get to 3 (and if you can hold out for it 4) orbs and then pop the chain attack with your most powerful team and blades.

I did this and the game basically became easy mode for me.

Healing is almost useless though; his evasion is so stupidly high that most of my arts that drop potions miss, while he keeps nulling healing. I have gotten 4 orbs (fire, water, wind, light) on the guy but it doesn't seem to stop him using any of his stupid overpowered gimmick arts.

The moment you have 4 orbs use a chain attack.  If you break all 4 in 2 rounds you get full burst and that should drop at least half his health if not more.  Keeping him from enrage and getting him down quick.  Its unfortunately the formula for every boss from that point forward as well as the post game monsters.