Well, Kagerou are giving me more value rather than Azami, I have my reason :
1. Ninja are more like support fire and only needed if there's spare melee slot to be put into, so the sooner Ninja be placed the better which Kagerou win because she's a silver.
2. I already have Saki so I only need 2 ninja in my rooster, 1 for damage and 1 for fast deployment.