Here is my take on the Sovereign Class, enjoy. I used the stats for type XII phasers from my Station construction rules.
Type Cost Offensive Value Minimum Size Availability
Type XI 7 11 7 2368
Type XII 8 12 8 2369
Sovereign Class Heavy Explorer
Origin: United Federation of Planets
Class and Type: Sovereign Class Heavy Explorer
Year Launched: 2370
Hull Data:
Structure: 35
Size/Decks: 8/26
Length/Height/Beam: 685/88/250 metres
Complement: 855
Operational Data:
Transporters: 8 Standard, 8 Cargo, 8 Emergency 1
Cargo Units: 80
Shuttlebay: 2 aft 4
Shuttlecraft: 16 size worth
Tractor Beams: 1 FV, 1 AV 1
Separation System: None
Atmosphere Capable: No
Cloaking Device: None
Sensor System: Class 4 E +4/+3/+2/+1/+0 4
Operation Systems: Class 4 E 8
Life Support: Class 4 E 8
Propulsion Data:
Impulse System: Class 8 .95c E 7
Warp System: Class 8 (Warp 7/9.4/9.95) E 8
Tactical Data:
Beam Weapons: Type XII Phaser Arrays (x5) E 35
Penetration: 7/7/6/0/0
Missile Weapons: Mk I Quantum Torpedoes (x2) 17
Type II Torpedoes (x1)
Penetration: 6/6/6/6/6
Deflector Shields: Class 7 E 15
Protection/Threshold: 17/5
Miscellaneous Data:
Manoeuvre Modifiers: +3 Command/-2 Helm/+4 Tactical
Starship Traits: None