How do people level up so fast?

It's not fun, or much less healthy, but it truly is a test of time commitment to really go far while leveling in such a relatively short period of time.

This.

After powerleveling/finishing Magnus quests I haven't been able to sit on Maple for more than thirty minutes.
Kind of sucks because I can't stand the thought of an empress run, while hackers are making bank on soul shooters.