Build changed slightly as I get more comfortable with a cannon boat.
So far, I've:
Kept the DBB. I like it.
Replaced the Impulse Engines with the Jem'Hadar engine quest reward. Gives additional weapons power while the Efficient Impulse didn't. Also gave me a big increase in turn rate. Woo. Thing's a fighter now.
Replaced Beam Overload I with Tactical Team I on Lt.Cmdr Tactical
Replaced Cannon Rapid Fire II on Lt.Cmdr Tactical with Beam Overload III
Replaced Tactical Team II with Canon Rapid Fire I on Lt. Tactical
Replaced Engineering Team I with Emergency Power to Weapons on Ens. Engineer
Replaced Science Team with Hazard Emitters I on Lt. Universal (Science)
I like this new setup because it:
1) Gives me just as much survivability as I had before (With Hazard Emitters replacing Tac Team I as a hull heal)
2) Gives me more alpha with Beam Overload III
3) Still gives me 2 Cannon Rapid Fires with minimal downtime between them
4) Gives me a significant buff on demand to weapons power.
So along with my Red Matter Cap, EPS Transfer and the occasional weapons battery, I don't have issues with low power levels after using Beam Overload III.