Team 1 should win. One super jinton will fodderize the six paths. Well there is preta path but it can't protect all the paths from the jinton. Team one has flight which only Deva does so the rest of the paths won't be useful such as Naraka and human paths. CT is countered by jinton. The multiplying dog can be buried under a huge pile of sand and then sealed away. Tsunade could always restore the chakra reserves of Gaara or Onoki if they happen to get low. Massive sand tsunamis could take out multiple paths of Pain. Tsunade would own preta path and Asura path quite easily due to her use of taijutsu and regeneration. Katsuyu can help in fighting against Pain's summons and Gaara can use sand sensing to locate the invisible chameleon.
Onoki should be able to beat Deva path IMO because I don't think shinra tensei can overcome jinton. Onoki can always use weighted rocks, rock clones and other various earth techs to avoid the impact of bansho tenin or shinra tensei.
Gaara should be able to handle the rest of the paths and he also has some good counters against Pain's various abilities. For example, he can't be stabbed by chakra rods and has good counters to Pain's army of summons as well as bansho tenin because Gaara could always hoist himself to the ground if he gets pulled or pushed.
Still Pain's army of summons, superior speed and linked vision shouldn't be underrated. He also outnumbers them in a 2 to 1 ratio so overcoming Pain won't be easy.