Excellent stuff! I have no issue with making entire albums in Koala - it’s beyond dope. When I started out I had a hell of a lot of less and that never seemed particularly restrictive.
As far as the extra stage goes, my personal preference is to render out loops of the component parts of the beat and drop them into AUM for the mixdown stage (so that I can sidechain with Bleass Sidekick and add a few additional effects) but it’s still an entirely iOS production. Still start-to-finish on an iPhone 6.
I’m just working on the next step of the setup, as it goes - incorporating a Photon fader and PT-01 with Loopy HD to make a portable scratch production setup… I’ll post up some video in the coming week. I didn’t receive all the elements yet, but should have them in the next few days.