Hi My client normal has bleach hi lights and 6/0 on roots in between to cover her grey. She now wants to go darker all over with a target shade of 6/7. Would it be best to pre pig the high lights first maybe with /33 or /43 or can I go straight in with 6/7. I need permanent colour on the roots to cover the grey but would I use colour touch or permanent on the bleach? I appreciate any advise.