The shield Palutena has around her temple is impossibly strong. Viridi suggests that you borrow the one thing that can shatter such a barrier: the Lightning Chariot. The Underworld Army is out in force to prevent this, however.
Fort Oinks take a lot of firepower to beat, and while they are still alive, they are bringing more Underworld goons to the fray. Ignoring the small fry while trying to bring down the fort is possible, but make sure you’re staying alert for incoming fire.
Viridi suggests that the best way to reach the chariot is to use a massive cannon to propel Pit into the heavens it rides through. As you approach the cannon, you can collect Recovery Orbs. Keep Pit safe until Viridi flies him into the weapon and launches him to the stars.
Even in space, Pit isn’t safe. The Underworld has pursued the Lightning Chariot this far as well, but they are having some difficulty just keeping up with it.
The chariot opens a warp tunnel that Viridi has Pit follow. Avoid the various Monoliths that are scattered throughout the warp. Hades’s decides to chime in around this time. It seems the Lightning Chariot is supposed to be quite the goddess magnet.
Watch for a Monomiknose to attack shortly after escaping the warp tunnel. Consisting of multiple monsters, a Monomiknose can absorb some punishment before going down. It will try to close in on Pit to attack, so be ready to counter with melee or dodge should it survive its charge.
Lightning bolts begin to crash down throughout the sky, complicating the approach to the Chariot’s resting place. The tower housing the chariot is massive, so Viridi logically drops Pit off at the very bottom floor after breaking through the final waves of enemies, ensuring that the angel must fight his way up every floor to reach the Lightning Chariot and its master.
You’re probably going to question her logic quite a bit here.