I think deadlifing 3 times per week is ill-advised.
Why don't you do squats?
I recommend you squat.
If you won't squat (you should squat), why not switch out Monday's and Friday's deadlifts for a few sets of lunges and Bulgarian split squats?
Or, if you want to stick to the deadlifts, why not try 3 different varieties of deadlifts. Do a regular deadlift on Monday, Stiff-legged deadlift on Wednesday, and deadlift in a trap bar on Friday. That should help engage at least some of the muscle mass you're missing out on by not squatting.
Did I mention that I think you should squat?