I believe we're specificly talking retrofits here. Of the retrofits the only Tac oriented ones are the BoP, Garumba, and Kar'fi. However the Garumba is 2000 C-points or months of grinding, and the Kar'fi is a flying space whale with the turn rate of a small planetary body.
Even the battle cruisers up to this point have been able to turn and get cannons to bear rather quickly, super escorts really, but the Kar'fi is... lacking.
I think a T5 Retrofit Raptor with a normal battle cloak would be a nice edition. Or the ability to get the Garumba with the LT.Gen token.