Premise of the ship is it is a desert ambusher and loot hauler. It has to sit flush with sands and be able to fly low without clipping objects easily. This would help it ambush convoys. If the Bonefish is like a battleship, the Scorpion would be a cruiser or corvette.
Concept design would borrow some ideas from the Mobula. In fact it could be a design developed from theft or salvaging Mobulas. So a more flat vessel. But instead of a massive weak balloon underneath, it would have balloons on the wing tips and maybe thinner ones that are partially exposed on the top deck. Could be similar to Goldfish, squid, or Junker balloons, something salvagable. So it would have two on the wings and instead of a massive flat area like the mobula, there would be maybe a squid balloon sticking up that connects to both decks but is clearly built into the hull. All share the same system. Altho in official lore it could be it has separate systems.
Weapon system would consist of two light guns to front, kinda like claws. Possibly near the balloons, maybe angled more like on a Mobula. Then a elevated heavy mount gun platform that sits at the rear of the ship facing forward. Which would give it the appearance of a scorpion. Could possibly make it able to raise and lower but not necessary. Ideally the gunner up on it gets a full view of the vessel below and the area around them.
If Pilot station is forward like a Mobula, then lets put the hull point back before the elevated gun, then the balloon repair point put under the pilot station in the bowels of the ship. Accessible via a hatch. You can get down to it quickly, but getting out of it and back above deck might take longer.
Engine mounts. I'd like to see quad in use. Make it easy and set them up on the top deck. Break em up with the balloons possibly. Or put them on the wing balloons. Top and bottom of them. So you can't shoot out both sets unless you really plan your shots. But then running on one set would cause the ship to be tough to control and list a lot.
Movement speed and gameplay. It wouldn't have the vertical ability of the Mobula. However it would turn better due to the quad. Weapon loadout is similar to a Goldfish so this vessel could be an answer to the Yeshan Goldfish. It wouldn't be as fast as the fish but it would have better firepower capability. Perhaps the Scorpion would have better armor/etc. So ideally it would be a design that could beat a fish in certain situations but not all.
For added appearance, could put colors and flags on the wings that fan out and look like scorpion legs.
So yeah, been on my mind for a bit now, just posting it to finally get it off my mind.