What tank weapons would you like?

[Shurrikhan]

An adaptation of Nightshade could work.

Since, they use dimensional rifts and attacks that manipulate time... It wouldn't be too hard to adjust them into creating rifts that allow their teleportation, as well as using time dilation/Mist type effects to create damage mitigation effects a la Riftstalker.

Fit it into the lore based on study of Ascians and how they have their teleporty rift things and have it so that someone figured a way of doing it as a mortal.

OooOoooh. Tell me more. Though, I have to wonder how XIV tanking and mobility, generally speaking, can exist simultaneously regardless of the tank concept in question.