What toner for ash brown/mushroom brown hair?

I have about a level 5 ash brown hair color on my naturally blonde hair with some strands around a level 4 towards my root and some highlights close to a level 6. I’m looking to tone my veryyyy stubborn brassy tones and all the blue/green shampoos I’ve been trying don’t work and aren’t strong enough (my hair LOVES to cling on to those red/orange warm tones from previous neutral browns). I want a straight blue tone without any underlying red or orange pigments and wanna find a toner I can use at home that'll get rid of my orange brass. I’m looking for something closer to a toner/gloss or demi-permanent that 1. will cool down my hair between appointments and 2. won’t make my hairdresser pissed off at me. Any good recommendations? I was beginning to look at doing a mix of Redken's 4ABn and 4NA EQ gloss.