I am approaching a working set of 400lbs for my dead lift. I follow double progression method which has proven to be easy to follow and consistent in its results. My routine is simple, I pick a weight to perform for 3 sets of 5 reps. Each week I add 1 rep while keeping the weight the same until I can perform 3 sets of 8, though I might go to 10 depending how I feel after my cycle. The trick is to pick a weight that is heavy for the 3x5, which is subjective.
Currently my working weight is 375lbs and I am on my 3 sets of 7 phase. It can feel already that it is getting tough to maintain consistent heavy deadlifting with the volumes I am working with. When I finish my 3 sets of 8 I am bumping up the weight to 400lbs and starting again from 3 sets of 5.
I dont think this method will be sustainable for 400lbs, but it has worked very well when I was using 335, 355, and currently 375lbs. How should I reduce my volume while maintaining the same general format to my lifts?