For what it's worth, the flavor of the month build for this is an aux to battery fit.
Using the fleet assault cruiser, you'd go something like:
x3 beams front and back
Wide angle quantum torp front (if you have it, your favorite torp if not)
Borg cutting beam back
Use your universal for science, get hazard emitters and transfer shield strength
For engineering boffs you want: emergency power to shields and auxiliary to battery on one, emergency to auxiliary, auxiliary to battery, emergency to shields, and direct energy modulation on the other.
For tac boffs, you want torp spread, tactical team 1, attack pattern beta, and fire all weapons.
Then you need three purple technician boffs (these can be got for free doing the b'tran cluster chain missions).
The basics of it is: The technicians reduce your boff ability cooldowns whenever you use aux to battery, with three of them your cooldowns will be 30% shorter. So you'll be able to spam your abilities much more often than normal. Not only that, but aux to batteries will up your shield, weapon, and engine powers so you'll be doing more damage, have stronger shields, and go faster in most situations. Be sure to use emergency to aux before triggering your heals, to maximize their effect.
Should be pretty high damage output for a beam boat, and with the reduced cooldown for your heals should still be pretty tanky. Plus, remember, superior dps is a pretty good tank as well. If you blow something up it can't shoot you, so you've reduced the incoming dps.