If you want to be able to do this, you should not get the DT and the DN. The Digi’s simply have not been designed for this scenario.
To be perfectly honest, if this is what you want to do, then I would recommend a computer running a DAW you like instead of a hardware setup. I’ve tried doing things like this with different kinds of hardware, and I’ve found that I always end up at a point where there’s something I’m going to need to do from a computer. Sure, some boxes have song modes that allow you to arrange a track by putting patterns in a certain order, but once you’ve done that, you’ll find yourself wanting to automate some parameters across those arranged patterns…
It would make sense to get the DT and the DN as a combo to create patterns on, to try ideas for arrangements on by triggering patterns, changing mute states, and parameters live, and then using OB (when it’s finally out) to record stems or tracks into a DAW and then do the final arrangement and mixdown there.