I always dome my clones weather in aero,bubbler,rockwool, or rapid rooters always have better result. The air stone helps unless your running true aeroponics ie not the little red plastic sprinkler heads most use. If your using true high pressure atomized aero misters similar to what stores mist their produce with then yes it will be aerated to saturation but I am assuming most have not spent the grand or so to set it up for cloning. I have a few dozen post here on different aero setups and systems over the last 7 or so years. It goes into more depth in those.
The domes allow me to keep a nice humidy war climate which helps induce root growth.. You can do what works for you but for me this is how I have settled on doing it with an average 98% success