From silver to a red brown

Hi! I havent done many big colortransformations on long hair, so I feel like consulting a bit. My client had very bleached long hair with a nice silver tint and wanted deep brown with red or plum in it. I am not certain if I should have pre-pigmented first, I decided not to because I thought the bleached hair would be so pourous it might become too dark.
So I used L'Oréal Inoa colors. Regrowth: 20g 5+30g 5.62+15g 5.26. Lengths: mixed in what was left of regrowth color 50g 5.62+15g 5.26+20g...

From silver to a red brown