I ran this til I switched over to the tac Vesta Class for my Joined Trill engineer... this is for Elite STFs.
MK XII MACO shield, MK XI Borg Engines & Deflector (Regen reasons)
2 DHC MK XII purple Anti-Proton cannons, 1 MK XII purple Qtorp launcher (Borg Edition), 1 Wide Angle QTorp launcher (Or if you don't have it, try 1 MK XII purple Adv. Qtorp launcher)
3 MK XII purple Borg turrets
Red Matter Capacitor, Subspace Field Modulator
Tac- 4 MK XII blue Ani-Proton Mag Regulators
Sci: MK XII blue Shield Emitter Array, Team Fortress Console (Or MK XII blue Shield Regen console)
Eng: MK XI Neutronium Armor, Borg Console, Tachykinetic Console, Theta Radiation Console
With that Eng setup, it just seems like it wants either dual Aux2Bat + Technician DOFFs, dual EPTS2, or dual Aux2Struc + dual EPTS1. Make an absolute unkillable always-buffed extra-tanky escort out of it. The extra hull and shields just add to that. End up with almost cruiser-level toughness plus escort-level offense.
For mine, I opted for the torpedo boat offensive. Cheap setup to see if I enjoy the fully kinetic combat style.
All photons (quick reload) with mines and a torp at the back. Dispersal Pattern Beta III, then the usual High Yield and Tac Team skills.
Science and Engineer boff's are setup for self repair and shield restore mostly.
All power to Shields, then engines.
Makes for very quick STF runs through eg. Khitomer, where the large stationary, and more importantly shiedless, targets are eliminated with much haste. Just as long as the rest of the team can take out the usual compliment of Spheres, probes, BoPs, etc
Tempted to move onto Quantums or Tricobalts. Tried a similar setup in the past using an Escort Retrofit on my Borg Engineering alt, with a full Tricobalt setup. Critical 400k damage from 1 mine launch using Dispersal Pattern Beta III.