Is dexterity useful for tanks?

[wolfonwallstreet]

Takes a special tank to go dex

[Drannak]

If you don't pvp you don't need dexterity higher than 50 or critical more than 15%. In pve and especially in mausoleum maps (for excample) mages and rogues do all the dmg with their arcane/mythic weapon's proc. Aslo you definitely don't need high dmg too. Just high strength and armor and maybe a weapon with a useful and good proc ( like glint aegis , Dragon sword or even the new arcanes ----but not necessarily ).