From the previews:
Endrinmasters are senior members of the Endrineers Guild responsible for the upkeep of the fleets, and they take great pride in the speed and firepower of the craft under their auspices. They can strip down and reassemble an aether-endrin while hanging upside down miles above land, and pick out a single misalignment amidst thousands of moving cogs using a mechanical intuition that other races might call magic.
An Aether-Khemist is an invaluable addition to an airfleet. The armour of these specialists incorporates an array of high-tech tools, including quadbreather apparatus that allows them to sniff out aether-gold hidden within thick cloud banks. In addition to harvesting and assessing airborne resources, their atmospheric anatomisers can vacuum away a foe’s breathable air or spray a cloud of lethal chemicals. Pressurised gouts of poison gas can be fired forwards in a deafening blast known as the ‘Roar of Grungni’, or a shimmering golden cloud of chemfog can be released with the pull of a lever, a metallic fug that boosts the power of nearby aetheric weapons.
Skywardens are elite members of the Arkanaut crews, a form of aerial cavalry that can scramble to aid the fleets. They use potent, heat-generating vulcaniser pistols to fell foes before lowering their skypikes and charging in to finish them off. Each Skywarden is equipped with skymines for harrying flying foes, and a timed explosive. These charges are the perfect weapon to aid the Skywardens’ hit-and-run attacks, for their delayed detonations cause chaos among the foe, allowing the duardin to jet away in a blast of aether-exhaust.
Endrinriggers are members of the Endrineers Guild, and report to a ship’s Captain as well as the fleet’s Endrinmaster. They bear rapid-fire rivet guns and aethermatic saws for conducting airborne repairs, flying to wherever they are needed in order to patch up damage to a ship. In need, Endrinriggers can put their high?powered tools to deadly use, riddling the foe with red-hot rivets or slicing through armour, flesh and bone with their whirring sawblades.