What I meant is that my avoidance isn't that great compared to the fact that I have 32k hp at my gear level, ie I've been gemming and enchanting almost exclusively for EH, leaving avoidance at what it is.
By the time you're in a good bit of ulduar gear the diminishing returns on avoidance is so bad it makes little sense to gem/enchant for avoidance (though 8 agility / 12 stam is still a good gem). The difference is though you'll need some extra source of +Defense via chest/armor/shield to maintain the defense
minimum. Numerically speaking, the gains from swapping out your cloak or chest enchant are better than swapping out your shield enchant. In fact, I would swap out my shoulder enchant before the shield (going from 20 dodge / 15 defense to 30 stamina 15 resilience).
For example, I'm about as far into stamina and non-avoidance you can go and still hit 29%+ dodge with raid buffs it seems.