If you use rapid rooters, you wouldn't need the cups, just a tray to catch water, you will need a dome for humidity though.
The reason I don't suggest cloning in soil for people new to cloning is impatience, most end up "digging" for roots, with RR's you will see the roots pop through the rooter.
If you want the easiest, most reliable cloning system, aero cloners,
Clone King , is my suggestion. IMHO the best $65 I've spent of my grow gear.
Like I said in your other thread, Patience is the most important part of cloning......
just don't fuc with em' !!
good luck