Hey guys!

There are a lot of lineup options for this one and you can make your own easily. I'll just show you a couple random ones

Overall guidelines would be:

-Ninjas that give extra standard attacks (Earth Main, Kakuzu, Killer Bee, Killer Bee [New Year], Anbu Itachi etc..)

-Ninjas that do more standard attacks each round (Lightning Main, Killer Bee [Samehada], Ay, Mifune, Shura, Pain Six Paths, Madara 10 tails]

-Ninjas that attack more than 1 unit with their standard attack (there are 3 enemies)

-Ninjas who have self-scaling passives or chases that gives them atk/nin each round

-Ninjas that buff your team atk/nin (preferably for all 10 rounds)

Something worth a try of course IF you have these ninjas. Really strong with multiple unit attacking standard attacks and buffs

Really f2p friendly. If you don't have any better ninjas you can consider using Lightning Main as a pos1 with his Lightning Armor + bloodthirsty skills for many standard attacks.

Sai breakthrough as a pos1 ninja is also an amazing f2p one because of his scaling clones, but I'll probably cover that next time