Have you tried piping the audio from the headphone jack into the Scarlett with a Y splitter cable?
The audio from SPDIF into the Scarlett is fine, the issue is the headphone out from the Scarlett has lousy headphone quality. I connected outputs 3 & 4 to the Kemper Aux In for now. The headphone output from a nearly $300 audio interface cannot hold a candle to the headphone out on the Profiler.