then again had the Klingon fleet pulled its ships guarding its frontiers with the Romulan Empire & its fleets battling the Federation Cardassia would have already been in an even more hopeless situation than before.
Cardassia was a 2nd rate power, the Klingon Empire clearly demonstrated its ability to fight a protracted campaign on 2 fronts.
the only thing I will say regarding ships is that the war does reveal the age of many klingon ships- the Klingon fleet definitley needs upgrading. however I would assume that the Klingon's would most likely deploy their best ships & best crews against starfleet. cardassia being a 2nd rate power with 2nd rate ships would be where older ships & less capable crews would be deployed against.