Hi. Please can you advise me on Toni g down a very blonde slightly sensitised client. Currently has majirel 9 on roots but the ends have lightened so much. I will be using dialight. Should I use 9 and 9:3 with 6 vol or 9 vol or is this the wrong formula all together? She is 80% grey on top and sides and base 7 at the back. Thank you in advance