With a cloner, like a bubbler or mister you don't need a humidity dome. But with soil or soilless you do and also need to spray, you also need the medium to be a good temperature.
Ive used most methods and had nearly 100% success rate with all of them.
These days I just fill a seedling cell tray with perlite and put an inch of water in the bottom of the propagator tray and leave them alone, no misting or dome needed, although it might take a few days longer than a aero cloner.
Cloning is one of those things, once you get used to the environment been right its piss easy. You will get the hang of it and have more clones than you can shake a stick at soon enough.