A shame really, i was looking forward for the Danzo Izanagi bt lineups to find some more creative than mine but i guess there's not much to do with him.
I'm the only one using him in my server and i use the following lineup below.

It's great, basically use Mabui on Danzo in round 1 and you'll have him & Kabuto ready to go in round 2.
If they somehow kill your main Kabuto will bring her back and you reset your whole team.
If the enemy is faster than you and cc's you, you reset and launch.
If the enemy cc's the main, wait for Mabui's heal and reset.

There's many ways to play this, you can even use Kabuto pos1 and danzo pos2 if you want to, but from my experience you want Danzo as stacked as possible.
Why? Simple. Danzo's burst = His HP+his crit.
If the opponent's crit is much better than yours you won't crit and therefore you won't do the juicy 100k crit everyone looks for when you use this ninja.
Definetely go for his crit passive unless you're like in the top10 players of your server, if that's the case just go pos1 Danzo and enjoy the ride, whatever you target in turn2 is dead.

I'll be revisiting this thread sometimes just in case someone pops up with a better lineup than mine, he's definetely a hard ninja to use but he's most rewarding than most, in my opinion of course.

That is a good lineup!
The problem i found when using the anbu hiding passive is that players using kakuzu creation can remove it too easily, so be careful with that.

Got the last two fragments of itachi susanoo today, pieced this lineup together. It's very decent.
I switched from wind to fire main because CC is really vital to have a slight chance of surviving in this naruto sosp meta. Use yellow shark summon for combo.
As the battle starts use Guy on Danzo, it'll make his mystery cost drop to 0 chakra in round 2.
Guy gives 2 konoha units an extra attack and clean 1 debuff from them each turn, ideally you want Itachi to get one that extra standard but if Danzo gets it that's alright too, this team initiates combo easily and Danzo removes inmunity with combo so yea that annoying frontline Naruto should be under control pretty easily.
If he isn't tho, that's why your main will use the seal of the red lotus mystery, use it on Naruto.
Aim your Itachi to anyone that can cleanse enemy's Naruto, you c*e him again in turn 2 so stopping enemy's position 2 ninja should be piece of cake unless he dodges of course. Needless to say to aim Danzo at Naruto in turn 2.

This is all or nothing, if your CC works then you're running the enemy down with pure basic attacks which by the way negate the possibilty of resurrection if is Itachi the one that kills. If your basic attacks ain't enough to destroy the enemy's lineup that's why I personally enjoy Itachi-Danzo's synergy a lot, Danzo's burst is great and you will use him to finish what Itachi started and viceversa. Enemies defeated by Itachi's basic attack or Danzo's mystery won't be able to be resurrected, enjoy.