I've found that improving the source is the best method to enhance detail:
-Consider an Uptone EtherREGEN AND an Uptone JS2 LPS. Utilize the JS2 dual power outputs to feed both your REGEN and Nucleus. The Nucleus is a good server and benefits from a better power supply.
-At the risk of being heavily criticized, try connecting your streamer to DAC with USB. My system produces more detail using USB over SPDIF. This relies on a superior DAC over streamer.
-Try using Roon to upsample Tidal output to higher PCM bitrate or even DSD.
As a sidenote, I strongly suggest plugging your amp directly into the wall. I’ve found this produces better results over even my Niagara 7000’s high output bank.