mei, mabui , tenten ,water main (water blitz)(once used to be a key f2p team, though fallen in grace, still is a good team.

water/light main, mabui, tendo, windblade asuma OR light main(4th mystery to make chakra for team), konan, wb asuma , tendo (mainly for GNW/bonds)

water main, tsuande hokage, sailor sakura, kimimaro/roshi(if you get him later)/nine tails chakra naruto/fuguki (burn and poison and survive),

mei, water main, jonin minato masked man masked man jonin minato iruka earth main/fire main onoki/fire main/joninminato/ masked man

https://forum-narutoen.oasgames.com/page/show-post-24452-1.html

https://forum-narutoen.oasgames.com/page/show-post-22388-1.html

earth blitz- onoki earth main, eight gates lee, iruka - works mainly for ninja exams higher level..but good damage team.

mabui playboy sasuke mei wind main

lightning blitz- light main, dauri, wind blade asuma iruka

earth main/tsunade/sakura/kabuto- old, but still may help you survive many a battles.

If you get danzo you can try danzo/fu yamanaka/sasuke susano/iruka

kakashi shonen/enma/ konohamaru/any main (for trolling in space time)

Get those summons cultivated