Been using the search function all morning with a number of different strings and it hasn't come up with anything that answered my question, so my apologies in advance if this has been posted before.
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Alright, I've been having a minor dilemma with picking appropriate trinkets for different mobs. With BC, there's actually a solid selection of trinket to choose from now, particularily for tanking - you're no longer stuck with the Styleen's/Ony Blood Talisman/LGG selection (and, if you were so lucky, a Glyph of Deflection).

+stam vs +block rating vs +block value vs +defense, multiple On Equip:'s vs On Use: etc. - the selection is huge. On my Warrior I'm carrying around ~16-18 trinkets at any given time, some of which are more DPS oriented, but most are straight up tanking items. In most cases, the choice is pretty clear. If threat is an issue, I'll often times side with any combination of my Drake Fang Talisman (+hit,AP for steadier threat gen from white damage and devastates) / Icon of Unyielding Courage (+hit,-AC for steady threat gen and a guarantee that my specials will land, plus a little threat boosting On Use: if needed) / Gnomeregan Auto-Blocker (+BV for snap aggro via shield slam, and some mitigation to boot).

The cases in which the choice becomes less clear are various too though - Adamantine Figurine vs. Styleen's Impeding Scarab vs. Moroes' Lucky Pocket Watch vs. Gnomeregan Auto-Blocker vs. Figurine of the Colossus. On certain fights I'll much rather go with the static qualities offered by Styleen's + Moroes', on others (such as Prince) I'll go with as much On Use: as I can stack, for the enraged phase, etc. etc.

Question is though - for large scale bosses that hit like a truck - what's the "smartest" or most efficient combination? Both in terms of spike damage prevention and healing efficiency.

Moroes' trinket is absolutely amazing for overall avoidance - but I feel rage starved at times due to avoidance streaks.
The autoblocker makes for amazing shield slams, and I just love seeing huge blocks, but it pales if Gruul is sitting at 15 growths (well, pre-nerf anyway) and hitting you like a truck, while it's a beauty in the earlier stages of the fight.
Styleen's has *still* got absolutely amazing static stats and for that alone, I doubt I'll ever get rid of it - but the fact that I can't go into "overpowered" mode by using a cooldown on it makes it seem a little lackluster compared to some of the other trinkets listed.

What about the Argussian compass, too? Been trying to get my hands on this forever, and while it by no means helps with mana efficiency (the Use: ability on it doesn't seem all that appealing), the 36 stamina is amazing, moreso since I'm not an engineer - on elemental damage fights and as spike damage prevention this thing just seems like a must-have in a tank's repertoire.

So I guess the question goes out to the other tanks - what do you guys use in your main set? What do you normally swap out? I've somewhat resorted to sticking with a Moroes'/Adamantine combination for the most part, but it just doesn't feel 100% .. "right."

Another point of interest of mine is the mathematical value of, say, blocking 54 damage per hit on every incoming hit vs. the static dodge on moroes' pocket watch - or the 200 BV (266 if specced for it) Use ability on the Autoblocker vs. the 1280 AC from Adamantine Figurine. How do these match up over the "typical" encounters? (Prince, Gruul's Lair, Magtheridon, SSC, Kazzak and Doomwalker - for example.)

Trash (level 70-72): Styleen's / Engineering
Reason: I don't keep shield block active since I'm trying to build threat as quickly as possible. Natural avoidance & block keeps revenge available (usually).

Bosses (level 73): Compass / Engineering
Reason: Stamina is king. I'm keeping shield block up all the time, so styleen's block rating is worthless.

5-mans: Styleen's / Auto-Blocker
Reason: Big shield slams are fun. On non-heroic trash and some of the easy heroic trash, 500+ block value is a large percentage of the total damage taken.

Clearly, there is some mixing of these categories. For example, for the evil, big bog lords in Heroic Underbog, I use the high stamina boss set (also high armor, but that's not related to the trinkets).

These sets are not just about trinkets though. I have partial sets for block value, high stamina/armor, and avoidance.

Fury Spec: Pocket Watch/Adamantite Figurine - unfortunately i still need the passive +def from adamantite to hit the def cap (gg no anticipation)

Prot Spec: Pocket Watch/DFT - +hit is huge, + dodge is huge. I love this combo, Pocket Watch is up so fast i can use it a ton (4-5 times on Doomwalker, great for his retarded burst damage).

While im still not a fan of On Use trinkets (i never hit adamantite's on use), Pocket Watch is still unbelievable. Still seems like DFT is amazing for tanking due to the abundant lack of +hit on tank gear (and the current trend of slapping +stam gems in every socket leaves little room for the +8 hit gems).

I'd love the DFT (for the hit), but it's dodge value is not exactly "huge." Styleen's, Dabiri's, and Adamantine Figurine all have higher avoidance via defense than DFT has dodge.

Sorry to bump this post. I'm not the OP though, Riot.
Is it a fair summary of the other thread that stamina is always king and that styleen's is crap on bosses (when shield block is active)?
Also, you don't need 25% block to be immune to crushing via shield block. Somehow, this is always comes up in tanking threads.

It's a very fair summary to say that Stamina is king at the moment, given most bosses's huge burst potential. Stamina + Ironshields keep damage good and steady.

And ya, I fixed my post.

Let's not forget important fights like any boss that Sunders or Mortal Wounds. Pocket Watch is very very useful for those situations where completely avoiding a special attack is important. I also use pocket watch anytime all my healers get feared on Nightbane because they had to be too close cause of charred earth.

Aside from pocket watch I always have my LGG equiped for similar reasons. Healers get feared, healers get silenced, healers have to move from cave-in, etc... Also any time that I might have to adjust a mob and potentially be out of heal range or LOS for a couple seconds.

Like others have said, auto-blocker is nice for heroics.

You've got to remember that the lifegiving gem is actually a "3000" heal since its a 1500 heal combined with a +1500 to max hp for 20 seconds. When you look at it this way, i agree that the LGG is nowhere near as overpowered as it used to be because of the stam increses, but its definately still a force to be reckoned with.

Personally, I use Moroes' Lucky Pocket Watch and Argussion Compass. Though I have no real desire to change the former, my decision to use these is solely based on never getting Styleen's, Adamantite Figurine not existing and using all my badges on epic FR.

I kind of have my eye on Scarab of Displacement, especially if it gets buffed in the next patch.

Did you read my post? I mentioned when I use it. And like the poster below you said, LGG is 3k HP, not 1500. I really wish we didn't have to explain this to people every time LGG is brought up but we usually do.

As far as "stamina always being king" that's horseshit. Many warriors way overvalue stamina and go as far as socketing solid stars into every socket they have instead of valuing 8 dodge and 8 hit (or 8 def, depending on if you're max defense or not). With dodge / parry / miss it's pretty easy to get 50% avoidance rate and for those rare times where you do get unlucky and take 3-4 hits in a row with no avoidance you have healthstones / last stand / whatever else you need.

To give you an idea of avoidance, with mongoose proc, agi elixir, druid buff and kings (no grace of air) and pocket watch activated I can get > 43% dodge rate. Not counting the ~17% parry and ~10% miss rate. Without pocket watch activated I sit at 28-29% dodge (mongoose procs a ton and lasts quite a while). Having super high avoidance can help you for many many boss fights where you want to avoid special attacks, or just avoid high damage attacks period.

In this day and age of Misdirects this isn't *as* big a deal as it ever was. Being able to misdirect to a tank and then again throughout the fight can offset this (with some exceptions of course).