I'm in love with your supports and the dense top layer feature, but because there is such a minimal amount of support material (especially for small columns), i have a hard time getting the support to stick well enough for higher support structures.
I'd love to be able to get (semi-)solid layer at the bottom of the support (like a raft, but just for the support), as a brim for is probably a bit tricky, so the probably easiest to achieve solution: create a dense layer also at the bottom of the support.