Some do stop feeding N before cloning, but some don't. I get roots in 11 to 14 days using rooters and don't stop feeding N. I would switch to rooters though, to me they are simpler than RW. I just take mine out of the package, give a quick dunk into a mix of 1 ML per gal of Super Thrive and 3ML per gal of Liquid Karma and stick prepared clones into them. I place them into the humidity dome under a CFL and mist lid every morning and every night and don't even mess with the rooters for about 6 days. After they get their quick dunking they are wet enough not too have to water for that long. I also use a heating matt so that the cloning area stays at about 80D. I tried some different methods and I just had to come back to this one. One last thing, some will feed the plants that are about to be cloned from some bloom nutes a couple days before cutting in order to get a faster rooting time.
Adieu