Coloured level 3 hair to a 6 with ombre ends, help!

[tiatia22]

My sister who colors her own hair to a level 3, wants Michelle Keegan's ombre . I'm thinking if strand test lightens sufficient, to bleach bath up to a red/ orange, the dry apply ombre effect in foils and low bleach if hair condition allows, then flood in between with a brown to neutralize the warmth. Then tone ends when done. Does that sound OK, or would you ombre right at the end?

 

[Dondon90]

I would probably do it in seperate stages. Get the base even first and then Ombre