Percy did eventually get dropped when they got to the fifth floor and the fight got far more deadly. The golems got bigger, faster, and stronger with each floor until Percy and other needed more than ten minutes to clear the floor.
A heavy crash shook the earth and sent a plume of dust rolling over him, but he kept moving, circling a stone monstrosity blocking their path to the next staircase. It was a massive golem with a circular body and six arms, which it used to chase Thalos and Hugo around.
The smaller golems were also scattered around, chasing Percy with their stone clubs, falling from the ceiling like bullets and reaching from the floor like nightmares.
You really need a small army to siege this place!
He turned and let off five shots as some golems got too close, and then threw a sticky bomb at them while they reformed. He was just stalling till George, who was fighting among a crowd of golems, was ready to cast a spell.