Computer MIDI Out -> Strymon MIDI In ->Strymon MIDI Out -> Kemper MIDI In
Kemper MIDI Thru -> Computer MIDI In
Please note your Strymon MUST be set to MIDI TH = MERGE!!!
Also, both units must be set to different MIDI channels, obviously.
This way you can send MIDI commands to your Profiler and at the same time have a full MIDI connection with 2-way communication for your Strymon pedal and Nixie. So basically the trick is to have the Profiler last in the chain. Downside without additional MIDI ports on your computer: You can't receive MIDI data coming from (and generated on) your Profiler.