User blog comment:AYET/The worth of the Shichibukai to the Marines 2/@comment-12333373-20140127212736

I think (as "ReverseMountain" below) that the warlords prettymuch were useless to the marines during the war. Accualy, assuming that Mr. 3 needs to see the key for a lock in order to make the correct key for that lock, if Hancock didnt give Luffy the key for Aces cufs, how would WBp and Luffy & Co. be able to release Ace? So all in all I'd say the Marines and 1 Yonko are even (when the marines are on the defensive).

As for the "power level" of each faction.. If we try to imagine a different case where: 1. Every warlord is present (Mihawk,Doffy,Boa,Jinbe,Moria,Kuma,BB), 2. All 7 side with the Marines or all 7 side with WB (or any Yonko), 3. They fight seriously (or even worse, they cooperate. But that would probably not happen). Giving the Marines and 1 Yonko a "power level" of 10 each I'd put my bet on 6 or 7 for the warlords, as if it was the Marines vs. the warlords, ~98 % of the Marines would probably be smallfry (Pre-timeskip). But this is my opinion ofcourse!