I’m in the process of toning my hair I started with a box dye just a super pale ash blonde which did this

Then I used a bleach kit which did this

Then I used a purple shampoo I did 2 treatments and it lightened a little

I have a hair toner coming Thursday in the mail wella t18 my question is should I use the 10 developer I bought with it or 30 devolper I’m afraid the 10 won’t pull enough my only concern with the 30 developer is that my hair will turn white lol I don’t have the money for a 20 developer atm and I have a 30 on hand already I just want this yellowy copper out any advice or tips would be greatly appreciated no mean comments pls tia