Question about Iron Golem

[Addah]

Amplify Damage will lower damage reduction, it will break it just like Amplify Damage can potentially break monsters immunity to physical. There is no max resist on golem, it can go however high you want it to.

That's really nice about no max to resist on golem

What I meant was if my golem had 100% DR% what would I need, say, 125% for?

Is amplify damage the only case a monster will break my golems DR%?