Once Nathan entered the battlefield, the pace completely changed. He leaped from one roof to another.
When he saw a group of aliens, Nathan immediately sent forth his bullets, killing them. He couldn't care less about the mature class aliens, considering they were not the main problem for him.
His power focused on killing multiple aliens more than fighting against one.
And Nathan didn't just help the right side of the dock.
Once he cleared up a portion of the aliens, Nathan moved to the very edge of the port.
He witnessed how the aliens emerged from the water one by one.
Amphitrite's power created turbulent water and guardians that could crush them, but it wasn't enough.
Hence, Nathan activated his Machine Gun Version and hit them with everything he'd got.