In my experience, that is usually a terrible idea.
Turrets and pets are the absolute worst thing to use in that room because they aggro the Borg and attract AOE attacks from the boss.
Engineers are the ones that usually cause trouble in that room by beaming down pets or turrets, aggroing everything.
Fabrication Engineers are sup-par compared to Demolition Engineers. Demo Engs can disable her shooting entirely for 15 seconds, and reduce her damage output by 50% for a further 28 seconds or so. And if she or rather when she floats on to a platform somewhere, run up to her and plant mines and transphasic bombs in her face.
If your team DPS is slow, you can quickly blow up the respawning borg to get control of the fight again.
Same with Armek, Demo Eng > Fab eng by a long shot.
Also like any other STF ground boss, Pulsewave to the face.