Tank Mitigation vs Tank DPS.

[Granyala]

Still doesn't change the fact that Tenacity > Direct Hit for tanks unless for some reason you really need that extra dps to meet DPS checks.

Let me chip in as a healer here for a moment:
I will NOT notice any single digit improvement to your mitigation in a savage raid. Tank damage is generally very spiky, enforcing cooldowns or you will eat dirt.
I will have to heal you back up after everyone. You taking 2K less damage won't change the # of heals I'll have to cast, not even over several minutes.

In order for me to notice single digit improvements to your mitigation, you need to take gradual/constant damage. That's where the "tank drops 5% slower" = "I get another GCD freed up" comes in. An example of that would be a wall-to-wall pull in a dungeon.

To be perfectly frank: tenacity is simply too weak to be interesting for raid tanks and since raids have rather nasty enrage timers, I can understand every tank opting for more DPS over survivability that, due to the nature of savage, won't help them or me.

BTW: I don't enjoy melding damage stats on my tank either. I'd wish there was a stat I could meld that makes me tankier AND be a community accepted choice. SE really did drop the ball AGAIN. My lil' Dork has the freedom to meld tenacity, because all he ever gets to see are dungeons anyway but other tanks have to conform or risk getting grief over it.

46.3% chance of dealing 11.5% more damage vs 100% chance of dealing 9.7% damage increase / Damage Mitigation / Self healing + Crit/Skillspeed/Det.

IIRC a direct hit is [normal hit * 1.25] a.k.a. 25% higher than a normal hit.

Napkin math puts DHit in front of tenacity by around 1.7%

Calculated for a 10 minute fight, a hit every 1.5 seconds (400 hits) with an arbitrary damage of 1000 for ease of calculus.
Eh change the 11.5 to a 25 in that image, forgot to edit the title but didn't save the document.

Tenacity is useful for improving your defensive capabilities while giving you some offensive boosts. Usually better when your doing content with Randoms.

I'd argue that for content with randoms (a.k.a. non savage/ultimate), the stat choice matters very, very little. If at all. Even ex primals have super generous enrages, basically: everyone does the mechanics right and no one dies -> boss goes down.