Tips:
1.Bring your best recruits, now the requirements:
Best - EoM + Silhouette (both of them, it make is much easier), try to find pure wind recruits.
Nice - EoM + Silhouette + 8ext + Silhouette (Silhouette is important, find recruits with maxed out talents, especially Silhouette Strangle, it helps very much because it can take up to 18% of your opponents HP) All wind recruits are recommended, but you can take Earth recruits to the mission, too, they have high HP and if they have EoM they are even better.
2.Bring lots of scrolls, maybe i passed it without them, but some of you have to use them, Special Rune Scrolls are recommended, HP + CP.
3.Try bringing as much HP burn jutsus as you can, and see if your recruits could have them.All helpful kinjutsus with burn status:
Hellfire, PCW, CW Reward jutsus.
Highly recommended kinjutsus with an effect:
Evasion, Dance of Fujin, Fire Pheonix Breath + Yama Great Fire Cannon, Wind Piece.
4.You need a burning weapon too, or a weapon with an effect:
Burning Yanki Sickle, Kaishaku or upgraded weapons from the Blacksmiths house.
5.Pets that can help you a lot with Genan and his puppets:
Keiko, Yamaru, Tomaru, Leiko, Kisuke. (I brough Easa accedentaly, forgot to take my lv60 Yamaru )
6.Bring as much negative effect jutsus as you can.
7.Heals are highly recommended in case you run out of scrolls.