why restrict edo tensei???? he would probably win with it, that's why...anyway, even without, oro would fare much better than jiraiya, but idk if he can beat all 6 without edo. it would only be fair since jiraiya had ma and pa...but whatever
he would beat animal path
1. manda> Cerberus summon and i think his snakes could at least occupy the rest. and he would fight for oro cuz oro could offer the dead pain bodies to manda as sacrifice. therefore pein couldn't revive them unless he had a spare body
2. in the case of an almighty pull from deva path, there's a 5 sec interval. in that time, oro could sprout kusanagi from his mouth and extend it quite quickly and possibly take out another path that would most likely negate with their body or such. if not, deva path is dead lol
3. kusanagi could take out the soul stealing one as well, since he has to be close
4. oro barely uses elemental ninjutsu, so i don't think that preta path or whateva could absorb snake jutsu
meh, these are just a few thoughts. but like i said, oro would fare way better than jiraiya...he might have a shot a winning with very high diff