Bandit LOAF
Long Live the Confederation!
The TCS Victory without Blair was, after all, "a second string backup carrier" that has not seen much "serious combat". Not exactly the ideal protector for confed last, best hope for victory. With Blair, however, it becomes an fearsome fighting force, capable of taking 5 Kilrathi carriers and multiple other capships, raiding Kilrathi prision worlds, and assaulting jump points on downtown Kilrah. Hey, Blair celebrity status even gives the Victory recognition within the Kilrathi royalty.
Again, I think you're missing the point - Blair didn't magically make the Victory a supercarrier. Tolwyn assigned Blair to the Victory and *then* moved the Victory to the front lines.
Blair made it into serious combat because he was assigned to the Victory. The mission for the Vic must have already been in the planning stages. Blair was just sent there to back them up.