Most of the points above are invalids.
Here is why:
http://wowwiki.wikia.com/wiki/Parry
http://wowwiki.wikia.com/wiki/Dodge
http://www.mmo-champion.com/threads/...ishing-returns
http://www.mmo-champion.com/threads/...returns+visual
And an usefull device to use in-game:
/run local b,d,p,r,a=GetBlockChance(),GetDodgeChance(),GetPar ryChance(),GetCombatRating(CR_DEFENSE_SKILL) a=1/(.0625+.956/(r/122.9625)) ChatFrame1:AddMessage(format("Unhittable: %.2f%% Avoidance: %.2f%% Defense %+.0f rating",b+d+p+5+a,d+p+5+a,r-689))
My fully geared monk has 35% avoidance which is nonsense. DR in warmane is broken. Period.