Originally Posted by
Petninja
Mel misspoke. Avoidance cap is impossible due to hard coded game mechanics. He knows this. He was referring to unhittable, or removing hit from the combat table. This can only be done by Paladins and Warriors due to the block mechanic. It doesn't work on real bosses, but on adds or trash it can be effective. However, the gear required for it is very strange and requires a mix of blues and specific items from naxx up to ToC. Tanks used it for Anub in ToC to marginalize the add damage. It really doesn't have a place anywhere else... maybe dueling stupid rogues.
I still don't understand where this 9% miss (hit) is coming from. All characters have a base 5% miss on their combat table, and 540 defense brings you up to 10.6% miss on your combat table.
Also, to be fair, having over 100% avoidance has existed in the past. It's the reason sunwell radiance existed in sunwell. I've seen tanks (and rogues) in gear in TBC that allowed for them to avoid every single attack on the melee table. This is also the reason they put diminishing returns on avoidance so it can't happen again.
Also, I've not heard of Warriors struggling to put out comparable threat to Paladins at the least. TBH I don't know a lot of DK tanks. Most of the DKs I know hate how DK tanking feels.