Instead of Nagato attacking the village the Titans invade.
The restrictions are that naruto only joins the fight 30 minutes in and Gai's team and Yammato join in 1 hour
Also, naruto cannot use the Kyubi.
Scenario 1: no knowledge on titans
Scenario 2 : knowledge of how to defeat the titans
In both scenarios all known titans are attacking KONOHA from all sides.
Since it seems the titans are too slow, let's say the titans win if they do more/same damage than Nagato did.