Why don't people like to pick/use Tenacity over Determination?

[Argyle_Darkheart]

You get the same amount of benefit. There is no diminishing return.

20% Mitigation = 125% EHP.
36% Mitigation = 156.25% EHP (A 25% gain from the previous)
51.2% Mitigation = 195.3% EHP (a 25% gain from the previous)

The point is that stacking mitigation will mitigate less damage than if you were to use them separately, whereas the opposite is true for damage buffs. Effective HP is a separate matter; it is not equivalent to mitigation.

Linear scaling improvement such as DH, Offensive Tenacity, and Determination have diminishing returns.

This statement contradicts itself. Linear scaling is, by definition, not subject to diminishing returns.

The damage you would gain from increasing your direct hit rate from 5% to 10% is the same as the damage you would gain from increasing your direct hit rate from 10% to 15%. The relative increase in direct hit rate is entirely irrelevant with regards to actual output (damage).

[Kabooa]

Stuff.

I feel like we're tackling the same thing from different sides.

I say DR doesn't apply to mitigation because EHP increases at a proportional amount, while you say it is because the raw damage itself is decreased for each additional instance.

I say DR applies to things like DHit because the relative increase is smaller for the same budget, while you're saying it's not because the raw increase is the same.