Which, since no one anywhere had any way of predicting what specific part the Klingons would just happen to need, remains irrelevant. I was saying that the Ship of the Dead is not the Klingon flagship, which it isn't. Starfleet, who has no idea what the hell is going on right now, is in no position to know this. But the Klingons evidently know it, which is why none of them provided Voq with supplies or resources needed to get the ship working again. It certainly isn't the "flagship" of anything since no one on either side thought bringing it into the war would matter to anyone until Kol decided it would. ... and is quite possibly the only shot this vessel even fires in this entire battle. They WERE. He felt he needed it in order to escape, once discovery started literally flying circles around him with the Spore drive. That same battle demonstrates that the ship of the dead is NOT notable for its maneuverability, as demonstrated by Kol's frustration with their inability to actually land a shot on Discovery. He specified earlier in the episode, when he mentioned "there are no birds of prey within range." The key word there might well be "in range," as T'Kuvma is also talking about the orbits of various objects. It's possible that the other ships he could have used for salvage were simply too far away and Discovery was nearby just by accident of orbital mechanics. That remains unlikely, given the other wrecked Klingon and Federation vessels in the area. Unless, of course, the dilithium processor is one of those scifi components that's made of explodium and will tend to self-detonate if the ship takes a direct hit to the engine room.