The defence/damage tenacity gives you is very very small, i think at this point 300 points are like 1% to both damage reduced and 1% damage dealt. 1% Damage reduced you will absolutely not feel.

I however absolutely agree that vit pots are currently worthless, tanks use str which feels a bit weird. If SE made tanks scale with VIT it would change the market a little bit.

The HP granted from these pots, has no value for a tank if you die its either an overtime thing (like those spicy new doted tankbusters) or a one clap. If you die because you had no mitigation up ... do you think you would time the pot right?

Im not an ultimate raider but i dont think even there a player would ever go "i need a few % more hp" and throw away their main stat pot in favor of that.

Tenacity needs some buffs.