I’m using the Osmo ikon violet bleach at the moment and love it! It has built in bond repairer (similar to olaplex) and lifts 9+ levels. I’ve used it on and off the scalp and had great results and no breakage afterwards. They also do colour additives you can add to it so you don’t need to use toner (red to cancel green, violet to cancel yellow etc) but I haven’t tried them yet. Clay lightener I’d say guy tang Kenra simply blonde is the best I’ve used so far.
Hope that helps!