Also, for those who don't understand the math behind the fact that there's no diminishing returns, here's yet another way to think about it:

Let's say you have 80% damage reduction (for physical or magic, doesn't really matter). Some people seem to think getting another 10% wouldn't help much. 90 isn't that much more than 80, right?

But: **90% damage reduction means you take HALF AS MUCH DAMAGE as 80%. **

Yet, at the same time, that +10% damage blocked is the exact same difference from 0% to 10%. There's no diminishing returns.

There are other ways to think about it that are more confusing, but this is one of the ways that makes the most sense to me, intuitively.