He's done it to the likes of Kakashi twice, he's done it to Zabuza like 3 times, he's done it to Pain once. I mean, doing it to someone as perceptive as Itachi should mean he can do it to Danzo as much as he wants. I'm genuinely not sure what way Danzo could counter it, sure he would anticipate it, but he'd still have nothing to do about it. And I'm not saying the clones will fight lol, I am just saying they are used to feint Danzo's attacks/gain intel. Also, I'm sure using one Kage Bunshin could be more then a game changer. It has equal ability to Kakashi so it's not going poof either, all it has to do is fight Danzo with it while he's hiding underground. The clone will be fighting Danzo in Taijutsu and once Danzo uses the seal he'll lose. But that's no problem since the real Kakashi now has intel on how Danzo fights in CQC and Danzo's cursed seal. Once he realises that to be the case he can just fight Danzo at a range, or fight in CQC with caution. @your strategy, it's countered via Suiton Wall. Also, my bad I thought I showed you the abilities he could use to kill off Danzo;
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I gave you the chapter link so you could scroll through [
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]. Kakashi landed his hit with the Chidori, and seemingly struck the Bijuu here [
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], meaning he was keeping up just fine while Naruto was not. Kakashi is far too fast for Danzo to land a mutual strike on him. Rasengan shits on Danzo's Futon Blade and makes him fly back, no chance Danzo is using his other hand before Kakashi has blasted Danzo 10 meters away. Genjutsu is also a massive factor in this fight, using it like Sasuke did could win him the fight in a similar way.