I am no profiling expert but earlier attempts to capture my amps were pretty lame. Fast forward a year or so I used a Suhr Reactive load (non IR) and ran the signal into a Focusrite 2i4 > Reaper > various IR's > back into the Kemper.
Thought the captures came out pretty good really. I almost gave up on the Suhr but the Pete Thorn video stressed the use of a XLR - TRS balanced line - cable. I used the cable to get good IR tones (just amp into audio device then DAW). It was then I took it one step further and profiled a couple of amps with decent results.
There should be some members here who can assist with your captures (notice IR's are used in their profiles). Wish I could help but as stated I am no profiling guru. Good luck!