No point in know anything close to your 1rm for deadlifts for a long time whatever it is it’s not a useful number and reaching total fatigue on any deadlift set fucks your CNS for a much longer time then your muscles take to recover from it and can leave you wondering why you are having shitty workouts week to week. Candito is garbage, in the way that he programs it breaks people. Both Layne Norton and Candito are incredible athletes one with great knowledge the other with so so candito being the later, anyways these guys have knowledge but they don’t take into consideration the long term effect. They make great instant results programs that leave you fucking broken the day after it’s done if you even make it that far. But there is caveats with every program, if there is a single guy here that’s ran Sheiko and hasn’t had their elbows been killing them because of it I’d be surprised but that is a program that will build a better bench... at the expense of your elbow health but man you’ll feel strong.
Someone like yourself I would change over to even something so simple as starting strength 5x5, will your bench grow? No but it’s better then your squat and deadlift so maybe that’s a good thing. The book “starting strength” will however make you laugh while you read about form and other movements that are going to make you even more powerful I.e the power clean. If you aren’t down for cookie cutter styles and just want to get better at deadlifting then I’d suggest something similar to
@johntt44 did, I mean you’re starting in a similar strength zone and he followed a very simple protocol one day of the week you do speed pulls the other day you do heavy pulls but you never fail a rep.