If you want to make it easy, for a subject you can walk up to, use the dome and measure incident. Just make sure you are not creating your own shadow....

To me, reflective mode with these are not that useful. Reflective mode measures light reflecting from your subject and hitting your meter. But.... without an ability to POINT to a certain spot of your subject, you have no idea what part of your subject you are measuring. Say you have a person with blond hair and white skin wearing dark gray suit. To make it more interesting, standing in front of a highly reflective pond. What now.... Yes, it can sort of measure average but how do you know the view of field of your meter is same as your lens?