I have run in-ears directly off the Helix. It works pretty well. If everyone else has stage volume, then there's not much reason to put anything else in your ears, honestly, as you can turn yourself up and down to compensate. But if you want to, I have used a path to run a mic into the mic in on the Helix and send it only to my ears for a more natural balance. I have moved away from that so that I have full DSP for guitar and am instead using a small mixer that can take a stereo feed from the Helix and a mic in (or line in) for monitoring everyone else. For one of my bands, we use our own X32, so I can run a feed from the mixer, but for the other band, direct from the Helix and maybe the mic in is what I always use and it works well.
