Rich Field (fukurokumaru) Extreme
version 4.0

level: 90
power: 83k

Azure Fang
talents: 4-3-3-1-2
summon: Dog of Hell (Nindog Shiba untested)
tactics: ghost kill

lineup:

Main.............Haku..........X
Gengetsu.....Chojuro......X
X...................X................X

Notes:
--Main:5 star, Haku:5 star, Gengetsu:2 star, Chojuro:3 star
--Haku [Edo Tensei] does NOT work as an a|ternate. I tried a dozen times and got no further than 282k coins (at 2 star--untested at higher stars).
--Most likely can't be done on auto.
--For Haku,
-------Round 1, raise barrier (before any other ninjas' action)
-------Round 3, let barrier fall without triggering Haku's damage
-------Round 4, raise barrier (before any other ninjas' action)
-------Round 5, execute Haku's damage mystery--near, BUT NOT AT, the very end of the standards (at least 1 standard needs to follow his mystery, since the normal Haku can't deal the final bl0w)
--I only tried this once, so it may have been luck--though, I didn't get many critical hits, so this may be a reliable setup.