I wouldnt go cannons. For 2 reasons. 1. You are wasting your sci abilities of subsytem targeting. And 2. With only 2 tac BoFF spots this leave just tac team1 and cannon rapid fire.

so i recommend going beams torps. You are a science ship so shields shouldnt be too much of an issue.

Go

Tac ensign torp spread
Tac lt beam fire at will

Eng ensign eng team 1
Eng lt reverse shield polarity
Eng ensign emergency power to shields

Now for sci it depends on how you like to play
Ens polarize hull
Lt sci team 2
Ltcmdr grav well

Ens haz emitters
Lt tachyon beam 2
Ltcmdr photonic shockwave
Cmdr viral matrix

I recommend going 2 beams and a quantum up front
And 2 beams and mine in back.

Use those subsystem targeting. Specifically engines and shields.