Long ago, I made a concept for Green Mage as a "trickster" tank; using a sidestep to teleport to a spot right behind a distant target, swinging a massive runed maul around as if it was made of air, having more offensive means of damage mitigation (a.k.a. lowering enemies damage dealt), and even transforming into a Biloko to steadily increase damage dealt with each attack used and steadily reduced damage taken with each hit dealt to them. The inspiration for it came from the runestones and buildings all through the areas in Dravania and wondering how a civilization of people would've lived in Dravania alongside the dragons prior to the Dragonsong War.

Given that devs effectively shot themselves in both feet when it comes to tanks, I could still see Green Mage using a similar trickster-esque theme inspired by the Sprite beast tribe we'll see in Shadowbringers as either a melee DPS (even though we have enough of those) or some sort of caster DPS (which there are better options for right now).