If you fly any escort type then you don't want to have too many tanking skills, the tanking abilities I have are:
Emergency Power to Shields I
Reverse Shield Polarity II
Hazard Emitters I
But then I'm a Science Officer, so I may have a higher Aux level than you.
My Akira weapons were, dual beam bank, dual heavy cannons and a quantum torp on fore; turret and quantum torp aft. Don't forget to optimize your power levels and consoles, for example, I found an RCS Thruster console great on all Escorts so far.
For my Defiant I gave up on beams all together, 2 dual heavy cannons and 2 quantum torps fore; a turret and quantum torp aft. Going for Fleet Escort, but I'm not sure if I should get the Retrofit-Defiant at VA, I find the Refit Galaxy to be the best VA ship overall... If it had the ability to dual fire any forward torpedoes I'd love the Defiant!