I haven't seen a lot of walkthroughs available for this one. I was told to try 8-Gates Lee and I've (mostly) cultivated him but everything is dying way too fast.

I've tried different formations of Iruka, Gaara and 8 Gates Lee, Mabui/1010/Mei, and Ao/Chojuro/Mei, Ao/1010/Iruka but the best I've been able to do is break up their combos by putting a water clone in the front row to take up some of the damage. I can't even get one of the four characters killed. My standard team (the chojuro one) is sitting right below 60k. I'd like to stay Water Main for this but I don't seem to have a solution to this beyond upgrading Iruka (who is only 2*).

Does anyone have any suggestions for formation?