pick ninjas based on the following catergories

a) does it fill a roll you dont currently have

b) do you need it to run with your ideal future ninjas or current ones

c) do you like it

any and all of the above matter when deciding to pick a ninja, unless you are * p2w every ninja is usable if your good enough, han is no exception

~edit~

i achieved 6 paths on another account using roshi, fuguki, sailor sakura and water by removing every single ini item then outplaying teams and punishing mistakes