This isnt ending in a stalemate because because there are way too many advantages for tobi, secondly unless minato has infinite chakra which he doesnt because edo doesnt grant that, if hewas to get exhausted or low on chakra, thats about.
Teleport the tbb? as i said one alone would exhaust him. All 6 would leave him on 0 chakra. Secondly what if lets says the first 2 paths form and shoot tbb at him and he creates a barrier. You do know that teleporting 2 bijuu dama's alone takes alot of time and if you go back to that fight it took minato quiet some time to teleport just 1 bijuu dama, its funny how after he teleported it did tobi show his face. Anyway in the process of teleporting 2 bijuu dama's which will take time, ther eis another 5 opponents he has to deal with. You think the other 4 paths plus tobi will sit back and watch minato finish teleporting the tbb's whilst all this time he is vulnerable. Meh tbh i wont even continue because there really isnt anything to argue about