Is one set of deadlifts sufficient enough during the 15 and 10 rep weeks? Im trying to hit deadlifts 2x per week. Towards end of 15s and 10s (approacing maxes) i found it very difficult and scared of injury to attempt a second set.
Do not go near your injury potential level, especially with deadlifts. One screw-up can take you out of the gym for a long time. Listen to your gut.
Yeah I would personally never go to failure with deadlifts. You don't always have to hit the perfect number of reps, so if you were to do a second set I would simply end it not super close to your max reps. Not only in terms of injury potential (which is so much higher closer to failure), but the sheer systemic fatigue would knock me out haha.
