@brunomarcs Regarding your comment: "You think this is a viable approach?"
Viable, sure. Optimal? Not exactly the order I would do it. I would want to go in the direction which is most likely to discover which components are most sensitive to certain types of cable upgrades (clarity in freq ranges of bass/mid-bass/mids/highs/ultra highs, extension in highs or lows, etc). So, I think it would bring you more understanding by starting the experiment with all freebie 16-18awg cables on all components and rotating all available upgrade options on each component, sequentially, component by component to find which component gains the greatest benefit from alternative cables you have available. 👍🏼 I think you’ll find this method efficient and effective.
In my digital system, I’ve consistently found that it’s best to optimize cables with the best high frequencies in the beginning of the chain, the best combo of high frequencies and mids on my DAC, something similar on my preamp, and make sure my power amp has a larger gauge to optimize lower frequency response and lowered resistance. For those with the budget, the Clarus Crimson High Current 8awg occ copper power cable is a fantastic power cable for amps, especially the more power hungry solid state amps.