Optimum config for Lumin u1 MIni

I'm replacing my Bluesound Node 2i with  Lumin U1 Mini.  My system is, uhhh, a bit eclectic however, so I'd appreciate any thoughts on the best way to hook it all up  I'm particularly interested in technical theories here - it's not helpful to say "just listen and decide." I will listen, but the setup is tight and reconfiguring it all is a major PITA so I want to put my best foot forward before messing around more.

The digital chain is an Assemblage D2D-1 feeding a Sonic Frontiers SFD-2 MKIII (no, not the MKII).  It's really intended to get the most out of CD's (I have many and it does).  However, upsampling only goes to 24/96.  Not state of the current art, but way better than CD's and in line (or better than) what's routinely coming from Tidal and Qobuz.  And that's what I typically listen to. 

Anyway, this stuff is old and probably unfamiliar so a few words are in order.  The SFD-1 is an upsampler, jitter reducer and fancy input selector.  It connects to the SFD-2 via I2Se.  Google the gear if not familiar.  It's pretty interesting. 

To repeat, my streaming sources are 95% Tidal and Qobuz.  Both basically run at CD resolution if I understand right.  I guess the issue is whether I'm better off sending the Lumin to the D2D-1 or straight to the SFD-2 au naturel.  I have no idea if there are potential jitter issues that could be improved by the D2D-1.  Similarly, might upsampling 16/44 material from Tidal or Qobuz improve that too?  What I can say is the Node 2i into the D2D-1 and upsampled to the SFD-2 is WAY better than feeding the preamp from the Node 2i's own DAC.

Any insights would be welcome.  Cheers,