if you're doing deadlifts for strength only, quit doing max deadlifts altogether
focus more on box squats, good mornings, sled pulling, rack pulls etc
the only full rom you should do for deads is speed pulls, say 6x1 and rest 30 secs between sets @ 50-60% of your 1rm once a week
in six weeks, you'll be stronger then you were before at your deadlifts