What about a Bombardier, for Missiles, or a Bowman? Considering where they are, tech tree wise, at maybe even and ARC-2R.
Could have gotten a Bombardier from the WOB storage Depot, maybe even brought some SL Heirlooms along.
Bowman was a HH design, imagine a few trials netted the scorps some.
Bog Standard Archers are all over the place, Original TRO3025 stated 100,000+ had been produced over the life of the design.