She's actually supposed to be about the same size as the Sovereign class. I'll have Bones hardpoint her so that she's faster and better armed than WC's Nemesis Sovereign, but a bit weaker in hull and shields. Basically:
1 Inferno vs. 1 Sovereign - Inferno keeps firing on the Sovereign, Inferno wins.
2 Infernos vs. 2 Sovereigns - If the two Sovereigns focus on one Inferno, they'd be able to take it down, then they can focus on the other, and Sovereigns win.