"The best way to train the deadlift is to not train the deadlift."
Everything core and POS Chain will actually assist\increase deadlift pulling. My recent PR came after over a month of not doing deadlift, but rather changing focus to box squats, good mornings, sled pulling GPP training, heavy standing abdominal work and as many pullups as I have reasonably been able to squeeze in.
If you are progressing in exercises like the power clean and pullups, you actually should gain DL and the very least maintain. Instantaneous force numbers for time * velocity * weight will actually be higher than static effort deadlifts for much less bar weight because of the highly increased velocity.