Originally Posted by
rabbimojo
At the same time, though, avoidance has qualitative effects based on its reliability or lack thereof.
If your avoidance is high enough that you commonly avoid, say, 4 attacks in a row, then healers can actually intelligently conserve based on that (assuming your stamina is high enough to let them feel safe.) Granted, nobody cares about conserving mana right now, but as a general principle, it is there.
I think your point is good to keep in mind when evaluating avoidance.
I think that it's also good for tanks to keep in mind the exponential side of it, where 30->31% removes ~1.45% of your incoming damage on average, whereas 70->71% reduces ~3.45%.
Both are useful interpretations of the benefits.