I will leave you this in here...
It is a bit double edged team due to MM affecting your Kushina, but his chase dmg and control mystery is nice compensasion.
It would be better to have SB Kushina tho. With double control mysteries and immunity suppress combined with poison and ignition, this team can solve you few problems. (especially since you play on new server, where players dont have that many ninjas yet).
Have fun ;)

Hi there,

that team looks nice, while waiting for new year Hashi and with upcoming events next week...
I might think about this team (if you feel lucky with skill trials... on new server you wont have stacked adv. material yet and you will need a lot of it).
This team provides nice control, and pretty solid way to shut enemy with +2 CD on chases and +40 chakra cost on mystery from Nagato can solve problem with lower initiative.
As for ninjas, Hashi is pretty much free next week. (only 3* needed for SB)
Kushina needs 4* so you miss 100 frags for now, but she used to be pretty much f2p with many free frags from events (happy grinding).
Nagato is pretty much f2p with free frags from this 3v3 arena and groceries.
Probably the biggest downside of this team is amount of skill trial material needed... but that c*so be f2p (Great plates are amazing event for free adv. material)
Have fun xD

I got team I posted, however I use Summer Kurenai instead of Nagato atm...

Works pretty well, its pretty nice control cancer... if you manage to get Kurenai in some events, you can give it a try...

For the main... even water is nice (poison goes through immunity thx to Kushina and she heals even more with ninja tools passive).

Otherwise, a f2p team now is Kushina, Hashirama, Chuunin Shikamaru and Fire main... that team can beat up enemies even fairly stronger than you thx to all the buffs for Kushina.