DC was at Heavyweight 2009-2013 and 2019-2020 ! For me, his HW prime was in 2019 : best skills ( boxing and dirty boxing, ), stronger ( low kick and punch was harder than ever ) and best chin ! Even if he lose against Stipe, he landed 317 shots in 4 rounds ( record for HW ) and punch 162 significatif strikes on the Miocic Head ! He was more athletic at LHW, but not the same punch and durability ! Which year you considered DC was at prime ?