Hello, needing a little advice on my clients hair please. Normally I would do a full head highlights with blondor, 12/17 and a global colour of 9/7 of wella. We are wanting to change to the largest craze ombré/balayage, very new to this technique and not sure which method would work best to the look we want to achieve also pre pigging roots before applying dark colour, any thoughts?? I also work with lloreal and maybe thought of pre pigging with 8/3 wash off and apply 7/3(as not wanting to go too dark) would I then need to wash off to then apply other blonde colours??sorry for essay xx