It took a long while for me to defeat it, I eventually had to wait till I was strong enough to over power it, and even then only got 1 star for some time, went back and 3 star it a while later. It is rather difficult.

It's just insanely difficult, i tried youtube guides and what not...the elite instances for the level 70 range where a total joke compared to this...S

When I was finally able to beat it I was a wind main and used guy, sai and Neji the wind main had dance of impertus and spammed clones the formation was

*x *x *x
*x Neji *x
Guy Main Sai
I was at level 77 with 24k power
I found that strat on another thread and oddly enough it worked. To add insult to injury after all my efforts alone no one died when I used this strat. So if you have access to wind you can give this a shot and see if it helps. Some people can't pass that one with full marks until level 80. So basically if everyone constantly dies now try waiting a bit until you're stronger or settle for beating the chapter with out the sealed for now and come back to it later on. Other then that can't help Normally it helps to mix and match to try different things and that's what Kakashi's shadow clone is for to help you test out new formations for the best possible results. I've been using the clone a lot lately. Well take care and good luck.

Not working at all with your line up. Sai gets two-rounded by Sasoris puppet standard and the clones don't help nothing, cause they get combo killed by Deidara and/or Kakuzua and Hidans auto attacks

No strategy whatsoever has helped so far at all, they all fail miserably and it's not about my ninjas, they are almost all fully awakend (75) and cultivated and equip is also as good as it can be.

This instance is just a pure design fail. The seal battle in the Deidara instance was already pretty hard, but doable, but this one seems to be impossible....

Actually the wind main strategy does work, and for someone at your power that instance was passable pre 2.0 with said formation/team. But the thing is that post 2.0 the difficulty of every blue portal instance were significantly increased (in case you haven't noticed those guys are at lv 79 now and they were lv 73 if I remember correctly). So, unlike the other blue portal fights where a special strategy is employed in order to pass with full battle points, this one does require you to combine strategy and power to pass.

Just a little curious: how far have you gotten with that fight, like how many akatsuki did you manage to kill atm?