I can’t mix and match and I don’t have experience with cables outside of stock and Shunyata power products. I went from everything plugged into the wall to Shunyata Venom power cables, except Sigma NR to integrated amp and Everest conditioner/20 Amp Sigma to wall. Next, I switched out cable for Venom NR for subwoofers and Sigma NR for all else. All stock to full Shunyata was a major improvement and further upgrade to Sigma NR was another improvement. Other cables/interconnects did not make such a dramatic difference, with the exception of upgrading to the Sigma Ethernet cable to my streamer. So, the two cable categories that made the most difference in my system were the ones that I least expected improvement. Currently, I use the six independent channels of the Everest for, Integrated, streamer, DAC, phono preamplifier and one channel per subwoofer. My turntable is on a lesser power conditioner and power cable.
I was sold on the Shunyata system and have my doubts as to making small changes here and there and expecting a major improvement in your system. I live in a new home, with a crazy level of building in my area, so maybe I have particularly noisy power lines, so your experience may vary, especially if you are looking to do something with one component at a time.