EDIT: For this first issue, of brim printing in support material, I discovered the "Brim Replaces Support" option when searching all of the options that have "support" in the name. So the first part of this is solved. The unnecessary support in the upper reaches is still an issue.
I've got a part that I wanted to print with support that had only a small footprint on the build plate. I wanted to print it in this orientation so the long cylinder would print where there was other stuff