Regardless of what class you play as, putting beam arrays on an escort is a waste of that ship's potential. Escorts are designed to dish out the damage, why would you purposely nerf yourself by running arrays?
Engineer Captains can be extremely effective in escorts, especially the blockade escort or Armitage.
If you want to use a beam, limit yourself to 1 Dual Beam Bank in the forward arc, the rest should be Dual Heavy Cannons, with Turrets in the rear. The engineer captain abilities can make back to back Beam Overload attacks cost effective. Also with Rotate Shield Frequency and Miracle Worker, you can be extremely hard to kill.
<-- Subscribed February 2010
The user formerly known as athenaX
current Tyrant of the 222nd Corsairs