Three quick thoughts:

1) What music are you hoping to make here? The answer might be different for techno vs ambient (or both at the same time)
2) I have an Akemie and find that the XAOC Zadar is a fantastic modulation source for it as you can quickly pan through a huge range of sounds and you get four envelopes out of it.
3) This is a ton of support for just one voice (well two with Akemie). Not sure if this is a good suggestion or not but I'd try to fit another voice in there, analog or digital either way.
-- troux

Hi! :) Good points!

1) I'm interested in ambient (like Biosphere) and electronica (like Autechre).
2) Thanks for the tip!
3) So far, I've been meaning to focus on Akemie's Castle, and then to explore Rings (exciting it using external audio) and Morphagene. But I'm curious about ideas as to what additional, complementary, voice sources could be, though!

Thanks!