Also, you guys are saying that outmaneuver will hurt turrets. No sure I see why. Turrets have a 360 degree firing arc...
Wrong. Firing arc always and only means front arc. Even applies to falcons. Turrets allow you to fire outside your firing arc.
Most ships have just a primary firing arc at the front of the ship, and you're completely right that equipping a turret (or flying the Falcon) doesn't change that. But the Firespray's (so far unique) auxiliary arc definitely still counts for, e.g., Backstabber and Outmaneuver.
Not that I think it would be the most effective squad, but:
5x Green squad + refit + predator
would fire like a howl swarm.
Or 70% of a Howl swarm, at least.