Rememember this fight
That battle showed us little of Danzo's arsenal
Now lets understand the mentality of Danzo in this fight.
1 Itachi finally betrayed the leaf.
2 He had to hold back to fight "Madara"
Even with this a 1 v 1 fight between Danzo and Sasuke (with "Madara" at ringside
Immediately followed by Danzo vs "Madara"
Danzo would have still won both fights with those conditions
The fight was not under these conditions
the first and only fight was 1 v 2
Danzo v Sasuke and Karin (with "Madara" at ringside
Karin saved Sasuke numerous times in this fight, by warning him in about his power after she cracked it not to mention warning him every time Danzo could have landed a fatal jutsu.
in 1v1 combat Danzo would have killed Sasuke and then "Madara"
These are just my observations. so