Plus, you can also run a high armor/con tank with Heoric Defense and Glyph of Warding - thus raising defense high enough to avoid most hits, and still be able to shrug off those that land.
High enough? A base DEX warrior has 45 + level + 4 warrior bonus = 65 defense at lvl 22. Heroic Defense/warding increases it both by 30 something points, but warding is very unwieldly since your target or your tank might move around, and I rarely use it.
As such, you can only really count on Heroic Defense. Which means less than 100 defense. You'd still be hit by the Revenant in question at least 50% of the time.
Often times it takes your mage(s) longer to set up full defensive buffs on your Dex tank than it does to set up a Taunt + Force Field with a high HP tank.
Totally incorrect. It only takes Heroic Defense for my tank to be completely immune to hit roll attacks (glyph of warding is overkill and unwieldly) AND still be able to continually apply threat via taunts/threaten/regular melee attacks. The force fielded tank can NOT do this, so if you pull aggro, then your tank can't do anything about it and your squishies must scramble for dear life.
Plus, force field + taunt STILL works on dex tank. It's just that Heroic defense is the superior option, since he can still be largely invulnerable while be able to keep aggro for practically forever.
Both tanks work, it's just that Dex tanks are better for tanking single bosses whereas a high armor/hp tank is better at tanking large groups of a variety of mobs.
I've said it before, if a red boss can NOT hit the dex tank reliably, how much more for trash mobs?
Sure the dex tank has less hp to tank spells, but that's where Templar's Holy Smite comes in. Plus the fact that Alistair already has 288 hp... more than enough to tank enemy spell damage before he rips them a new one.
Dex tank gets chewed alive against spells. Dex tanks cannot dodge an attack from flank, behind, or while they are stunned
That's incorrect. Your defense still applies even when the enemy is stunned, as I've seen my archer still miss against stunned opponents from her previous scattershot. Of course, someone who can look into the code can disprove me, but this is my experience.
And flanking/behind? You do know Shield Tactics exist to completely eradicate any such notions, right?
The most a Dex tank can do is off-tanking. Only a Con tank can get you through on any difficulty above Easy.
Oh, puh-leeze. I'm using a dex tank, and he works wonderfully at Nightmare.
Seriously guys, are you guys just theorycrafting or this comes from actual game experience on Nightmare? I've tested CON tanks via Oghren (see above), and its nowhere near as effective as DEX tanks, considering I used more resources than I usually do.