Why would you get the agi card?
The strength card would make an excellent threat trinket since the static strength would benefit the damage and hence threat on all your abilities. I'm working on one myself.
Personally I drop the points from Anticipation rather than Shield Specialisation in the 15/5/51 spec - block is very under-rated and avoidance is not required for any current content.
I read a comment (in a discussion about shields) to the effect that "a small amount of avoidance is more valuable than a decent amount of block anyday" and I couldn't disagree more. Block still procs revenge, it also gives you rage (as you're still getting hit) and triggers damage shield. Parry and Dodge starve you of rage. There's no current fight like pre-nerf Brutallus where huge amounts of avoidance are needed.
If it were me I'd ditch that dodge trinket from emblems.
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