greetings...for such a team formation i think breeze dancer or crimson fist mains would be great for you to have...with the breeze dancer you will be able to clear the team mystery cool down to 0 which will make your team highly dangerous and since your team will be mostly depending on kushina..the breeze dancer will be a great supporter for her which will make kushina to gain more power potential...crimson fist would be great for you on making your team endure alot more and survive for more rounds..with the crimson fist defense supporting your team will be both dreadful on the attack and the shields will consume your enemy attacks this will be great to reduce the damage on your team..and will be making your enemy open for your attacks at the same round or the following one..scarlet blaze might not be of a great help for you here ...i think only his bani chakra and jutsu users boost talent would be a benefit for this team formation..as for azure fang she could be a good supporting surely..mostly she can be great to heal your team but i think on such a formation the crimson fist can be giving the best terms of surviving...midnight blade would boost your kushina attacks but mostly he will be solo combat..mostly he wont be giving benefits to your team as much as how crimson fist or breeze dancer could give...hope this can aid you on deciding the best main for your formation...

best of luck...

Heyo,

i was thinking about Light main because his mystery remove Buffs+Shields, which might be usefull in some situations, but i'll try Earth main or maybe Breeze cuz her Dust mystery which would be pretty usefull too, thanks for your advice ;)