Iruka, Pain-Tendo/Asuma WB and Hashirama

That's not very helpful.

As one of the strongest on my server, my current suggestions would probably not work for you. However, back when I first started (which was a few days after Server 6 opened and I was quite behind), the teams I ran with to clear from about 1-9, were summon teams that could clear without soaking up too much damage.

Perhaps something like Kankuro, Kiba, etc (I don't want to recommend characters that you haven't cultivated and awakened, so you'll have to decide on your own which you want to use). My main team was Fire main, Kakashi, Neji, Iruka (which can be replaced with Guy for the lifesteal). The problem with this team, if you run Guy, is that you won't have the shield and will most likely take damage (unless you clones can soak up enough damage that you can win without taking much).

Remember, it's wise to abuse the retreat to get the "perfect" run where you take the least amount of damage, while getting those RNG combos off your standards. So to recap, run a summon team to clear as much as possible until you start taking too much damage. In which case, I would run my main team and see if they could beat it without taking damage. If not, the third team (which I just run some sort of decent damage or ignition, Jiraiya, Tobi, etc) can take down the team, or at least cripple them for my main team to finish off.

Use a suicide squad. :D

Anything with Hinata and a healer should full clear survival with single team if you play smart.

Fire Main/Hinata/Kakashi/Kabuto.

2
3
3
2
1 Talents with Small Katsuyu.

Or for winds their empress team Karin/Hinata/Kurenai.

2
3
1
1
2 Talents with White Tiger.

Dont know if it will help or not, but upto level 10/11 , I use Neji, guy, Konkuro and sakura.. sometimes it can be tricky, especially if there opponent has mirror or ninja like Naruto, Kiba etc who can start chase from round one with their standard.
The general formation I use:
Konkuro - Guy - Neji
Sakura - puppet - X

if opponent has a kiba or naruto Directly facing Neji, then place konkuro puppet in front to sock up the dmg, but keeping the move order same. Something like this:
Konkuro - Neji - Puppet
Sakura - Guy - X

If opponent is still giving you trouble, try to mix and match. After all, its an AI, so watch the pattern, mix and match and hope for a good rng. Naruto - Gaara - GNW Neji c*so be a great team too, if you mix your main here and use a proper summon, it can do a great job.
My main team consist of Hinata-kakashi-Tobi . Tobi's revive passive can be really handy.

As a final note: Use the ninja you have worked so far and try to make a control/heal type of team. It never does hurt to experiment a bit to get the best result. Good luck.

I personal run a control team Ino Shika KKS and Naruto. As Naruto standard can by pass Hinata/Neji and start the combo in round 1. Also Shikamaru can prevent enemy 1st round mystery like poison from Karin or barrier from Sasuke.
On second round use KKS mystery to aim someone who casting their mystery then use Ino mystery to aim someone who you think gonna use his mystery next round after his standard attack.
Formation :
Shika - Kakashi - Kakashi clone
Ino - Naruto - clone
x - clone - clone
I don't even use my main team before 10 or 11th stage and here is the result

Thanks so much for the help guys! Lot's of good info here :D

Making tons of progress but still getting caught up at the end. The struggle is real.

Something that helps me normally in survival trial is adjusting to other people's setups, for example, using puppets if they have Hinata, Kimimaro, or Neji in front, or using ignition and poisoning against units with shields.
If you manage to get Jugo, Sasuke, Suigetsu, and Karin (can be replaced with Kabuto)
Formation:
x - -
x - - x
x - - x

The ninjas that I use for Survival Trial which help me complete trial breakthrough AND survival trial are:
5* Sasuke, Karin
4* Deidara, Azure Fang, Suigetsu, Kisame
3* Sasori, Jugo, Tobi, Kakuzu, Chojuro
2* GNW Hinata

You may be able to last really well if you use your GNW Neji in the front, and then rely on a healer behind him, and support that with an attacker. Then a puppet user below that. Example lineup:

x x
x x ---
-------------- x ------------ x -----------

Not sure if that helps much.

i usually do cursed mark ninjas lineup (kimi, kabuto, jugo, sai gnw) until they all dead then use my main team (main, sasuke, karin, hinata)
i finished all 12 around the same level as you

it's important to have a ninja that use summon to be meat shield and it's preferable to have shield (in my case both kabuto and sai gnw has summon and jugo provide the team shield)

after i see your ninja my suggestion is do it like this
kankuro x gnw neji
kabuto kimimaro x
x x x

it will be bad combo wise, but it has acupunture, tank, healer, summon and DoT, i use something similiar with this in my another account but with GNW kankuro and normal neji, i can finish all 12 no problem in around lv 60 too

You can try maybe something like this:

Karin FireMain x
Kurenai Anko x
x x x

2-3-2-2-1 and purple Deer
on 1st turn go Anko's mystery and put up barrier, on 2nd turn Main mystery to burn them, on 3rd Karin and Kurenai. You have Kurenai's deflection of 1 debuff, and Main's deflection too - so you'll be safe.