Thank you @grahambrot,
OK, maybe I should only get one small single output mixer, like a Intellijel uJack and mix voices with a performance mixer. I just don't seem to find such mixer which can pan, maybe I need an extra panning module. OK with the one DPO as currently the only oscillator, a multy channel stereo mixer seems too much, I was going to think ahead for times when I have more voices, and then I would like to pan single voices left or right. For example I add a bass drum module, snare module etc...
I see my rack might become too small soon :)