I am running a 3 Dual beam array + 1 DHC + 3 turrets config right now and it works well somehow.
It's only truly effective when used with Beam fire at will 3. Unfortunately more and more pets, minefields and such make it into PvP, means i lose all my power on a single target. Attacking 8 targets means 200 dps on each which is rediculous. Good for clearing mines but bad against players. This ability should stay in the game but for tacs it would be nice to have a counterpart to CRF. Beam overload is nice but only useful as a finishing move. So Fire At Will equals Cannon Scatter Volley and Beam Rapid Fire would be the counterpart to Cannon Rapid Fire.