I've got the same guitar and working on patches for it too. I have a patch set up with the mag pickups going into the guitar in jack, and the piezo going into the auxiliary jack. so I can switch quickly between the two. Basically each input is its own chain to the output. For the piezo side I added York Audio acoustic guitar IR but I'm still working on deciding the hi/lo cuts and effects for that side. It also has to be boosted in volume quite a bit to even out with the mag pickup side.