In response to your inquiry regarding Patrick Alt's suggestions in his Pt/Pd video, where he recommends metering shadows so that they are placed on zone IV, rather than zone III and processing film to N+1 rather than N, both techniques depend on the specific conditions that the photographer encounters. While open to interpretation, zone placement of shadows has been discussed at length by Bruce Barnbaum in his online, You Tube video, "Placing Shadows on Zone 1V,"
https://www.youtube.com/watch?v=rlnt5yFArWo

The successful practitioner of Pt/Pd print-making benefits from a firm understanding of negative development and negative density and how that impacts print quality. Rather than uniformly developing to N+1 for Pt/Pd negatives, Dick Arentz's book provides a wealth of useful information regarding negative density values. Dick and Patrick incorporate(d) divergent methodologies in their approaches to Pt/Pd print making and perhaps, after studying both disciplines, you can interpolate helpful techniques which best serve your specific needs. In addition, in the second edition of Dick's book, Platinum & Palladium Printing, Stan Klimek provides in depth details of paper humidification prior to printing which you may find to be of interest. Certainly, there are alternating views regarding this subject. Given the complexity of Pt/Pd printing, both Jim Noel and Vaughn offer sage advice to concentrate on methodically changing one variable at a time.