[Poinas]

You need physical resistance + vitality resistance. Legendary Demon's Blood with vitality resistance completion bonus will max your vitality res.

For physical res, max Battle Standard and throw it far enough so it won't get destroyed. You can equip Star of Ishtar for example, the artifact has 15% physical res. Ignore Pain nets you another 15%.

Also it's a good idea to have 80% stun res, and not have all 3 Hades at form 3 at the same time.