Actually 1 works also with azure fang.

You just need to place them this way:

X x x

AF samui Ay3rd

Darui x x

Talents: 42343, summon: dog of hell. Summon mystery: ninja dog or pakkun or giant katsuyu level 3.

Even if the average damage is lower, it's globally safer (combo starter + buff/shield removing in round 1 thanks to skewering on the target you want to cc + healing very likely destined to ay, since is the most exposed ninja to damage).