I'm finding my floorless mid fly alone to be surprisingly effective and plays on the black fly/mosquito own instincts. With the door latched open, perimeter gap, and peak vent - it's only ~80% coverage, but that seems to keep ~same % of the fliers from even entering. Then of the ~20% do follow me in, it seems like ~80% shift their focus from nourishment (me) to survival/escape and bang along the walls up to my large peak vent/headhole/skylight where they exit. I now only setup my inner net tent for sleeping so I don't have remove boots, zip though doors, and have more space. A pryamid fly can also be set-up/take-down in about a minute, so might be worth longer lunch/rest breaks.

I also carry some Picaridin, and use a headnet w/long pants/sleeves outside, but often prefer not to cover myself in chemicals or heat-trapping clothing... it's nice to have more options.