You can use Tielines, but Avantis has a dedicated Virtual Soundcheck ‘Record Send’ function. This takes the signal at the same point (after the preamp, before digital trim and processing) with one difference: whereas Tielines are patched in the socket order, Virtual Soundcheck Record Sends are patched to outputs (and back to inputs) in the channel order, so if your socket->input patch is anything other than 1:1, Virtual Soundcheck will make the whole process easier. Also, it doesn’t depend on Scenes, and it overwrites the I/O patch only momentarily, meaning your original patch will stay in place.