I've been experimenting with SFB ships for a while. Here is my interpretion of some weapons:
Phaser 1: RNG 15, 3+, 1, 1, 1, Doubled Range Modifiers
Phaser 2: RNG 12, 3+, 1, 1, 1, Doubled Range Modifiers
Phaser 3: RNG 3, 3+, 1, 1, 1, Doubled Range Modifiers
Photon: RNG 12, 4+, .5, 2, 1, Re-Rolls PEN
Disruptor (30) RNG 12, 3+, 1, 2, 2, No Range Modifiers.
Plasma F: RNG 6, 4+, .33, 2, 1, Range Based DMG
Plasma G: RNG 9, 4+, .33, 2, 2, Range Based DMG
Plasma S: RNG 12, 4+, .33, 2, 2, Rane Based DMG
Plasma R: RNG 15, 4+, .33, 2, 3, Range Based DMG
The other change I made was to use more that three weapons banks as necessary to accomodate all the weapons some ships have in SFB. The Gorn DN for example has three different plasmas and two different phasers.