Fortress

The Flare' Fortress class have been covered a few times by this point, but I never actually drew a good full-body picture of them and the various faceplates they can have.

Fortress armor can come in four forms, becoming way more expensive as the tiers go up, Iron, Thaumium, Void, & Shadow.
They can also have six types of 'masks' or faceplates that all have different effects. The faceplates are designed a bit different from those in Thaumcraft proper as Flare & particularly Aqua have a different culture than normal thaum stuff but I tried to stay close to canon. Anyways, lore time.

Flare Fortress' units are made up of criminals & people driven off the edge due to warp, and basically told to fight till they "pay off their debts to society", or till they die. Fortress' are not allowed to take off their armor until said endpoint is reached either. They typically fight with a greatsword or sword/Kiteshield rather than magic or firearms, and the unique armor design allows all them to withstand all but heavy/focus fired firearms.