Need advice

Physical resistance is important stat, since it’s by far the most common damage type. Armor helps you soak smaller hits and physical res with big hard hitters. For example you can try fight these troll bosses in campaign and see how much damage they will deal to you or even hulk guys.

Physical resistance is on items, don’t you have Mythical Final March boots, or Valor pants or something like that?

For more info about what stats your build should have, check my guide: