How I plan a drone flight near controlled airspace

My professional piloting experience led me to obtain my Part 107 certification and become a drone operator, therefore, it's natural that I rely on the same skills I've employed for the better part of two decades. What we see here is the airspace system of San Diego International Airport and the surrounding, smaller airports. We know that you can't fly a drone higher than 400 feet Above Ground Level without prior authorization due to larger aircraft and safety concerns. 

Below that picture we see a drone-specific layout of usable airspace. The numbers in each block represent the maximum legal altitude for flying a drone without requesting authorization. So, before working with any client, I have to discuss their needs, check that airspace, and see if I need to request approval via FAADroneZone.