It took me seven days to reach the 100th floor and have the party at level 800 total on average. Things went way better than I expected, the cash shop items really served their purpose. Pay to win for life!
On the 56th, 69th, and 78th floor, we came across groups of people killing things. I had found the lack of high leveled people in Mountroad a little odd, considering there's a dungeon in the city. Turns out most were delving the dungeon or taking a break in the city according to Yolin.
I deftly ignored them, however. They shouted some expletives my way for killing everything, but I paid no attention to them and continued my speed run.
Lapia helped me do the math:
1 hour for each floor from 6a.m. to 10p.m.
Sleep from 11p.m. to 5a.m. to function properly with rotating watch.
1 hour for lunch every day, and thirty minutes of break to avoid going insane from the monotony.