I've always been skimmerless. I don't do anything to compensate and I rarely do water changes.
I added an undersized skimmer to The Tub about a year ago, but I don't run it constantly. I haven't been as successful w/ macro in The Tub, which was my main reason for adding the skimmer. I keep mostly LPS and a funky pink SPS that seems to like the unskimmed water. I also keep a fairly low bio-load.
I think skimming factors in to what you plan to keep just as much as your lighting choice. Feather dusters, LPS, clams, mandarins & potters angels seem to do well in "dirty" water.