If they know the abilities of the others, what keeps pain from pulling all of the kunai to one spot. At best Minato warps way away to a kunai that is out of Pains range/line of sight but that also keeps him out of range to attack. I feel like this would quickly end in a stalemate. Minato summons have no effect on Pains. Gama can't tank all of animal path also invisible chameleon FTW. It would just turn into a game of Minato being in danger and teleporting to a far off kunai. Blindspot attacks don't work on Pain and that is what FTG mainly is, so even if a kunai was thrown, he teleports but always into the vision of one of the pains.
End game here is that Pain uses chibaku tensei to pull in all Kunai and Minato. Minato either warps far away (which ends in stalemate because chibaku tensei has a large range so Minato wouldn't be able to get back into battle because all kunai near are sucked in) or he is sucked in and is crushed. Pain wins high diff or stalemate.
