Team old wins, high-diff.
Hiruzen > Ay (
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). I don't know how well he would be after fighting Ay, but i'm sure he wouldn't be more than tired because any hit from Ay that landed would most likely mean certain death and if he's stronger than means he wouldn't die, therefore wouldn't get hit directly.
Onoki can't beat Bee alone, but i'm sure he can entertain him long enough for Hiruzen to team up with him. Then Hiruzen can keep Bee in place with Enma pole, giving Onoki time to charge his Jinton.