I guess I will be the party pooper. You're using it as a streamer, so the heavy lifting is done by your standalone DAC @kckrs
All you need is a streamer with a user friendly software system if it has one and one with good processing power is all and thankfully you can get one for pretty reasonable money and then connect you your DAC via any of the digital inputs and you're good to go.
Overthinking it and using anecdotes of people here and trusting it (including me) iá¹£an exercise in spiralling.
So yes connect the Wiim Ultra which has the best processing power of the Wiims and USB input on your DAC and you're all good