I've been adding back off sets of haltings or deficit pulls after my one DL workset. I respond in the classic manner that is the reason that SS and PP generally call for low volume of heavy pulling - DLs fry me bad and take me a long time to recover from. My squats the Tuesday after I pull heavy on Friday (today, for example) are usually pretty awful. Nonetheless, at a certain point I do think the extra work is helpful.