Crow clones don't explode though ? The Shadow clones explosions won't catch Danzo especially with a superior eye to Part 1 3T Kakashi who could anticipate it and save Kurenai. Plus Danzo just needs to keep his distance and attack with a wind style Jutsu rather than touch or hit it. The explosion doesn't really have feats that suggest it would kill Danzo who can regenerate. That's half of Itachi's chakra gone.
Danzo's large scale wind style would put Itachi and his clones under pressure and his clones aside himself aren't as fast to evade all those large scale attacks. Maybe the Shadow clones but that's still tough for them and that's a major waste of chakra and the more use of chakra, the slower he becomes
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. Not to mention the crows used to form clones are summonings. Which means they have a particular time limit before they are withdrawn.
I see Danzo winning Med diff.