Are you getting equity? If not, why the hell would you want to take anything below a regular salary? If yes, it really depends on the circumstances.
I understand that it depends on circumstances, I'm just looking for a few data points to understand what is kinda-normal
As the company becomes more and more profitable after X rounds naturally the equity reduces for new hires and the rate increases. So with the above example, if you gave your second level hires 10% it should be in the range of a 20% reduction from the median wage. By the time you are at 1-2% equity rounds of hiring. You should be close to or above market and the equity is more of a leverage tool to get and retain top talent.