Just my 2cents.

Tac Com - TT, CRF1, THY3, APB3
Tac Lt. Com - TT, CRF1, APB2
Eng Lt - EPtS1, RSP
Sci Lt - PH, HE2
Eng Ens - EPtS1

I've had much better results with this setup than having THY3 on Tac Lt. Com slot. Besides you'll be helping cruisers and sci captains with 2xAPB. I also switch BOFFs depending on the situation. My 2nd setup replaces CRF1 with CSV1 and THY3 with TS3.