SergeModular

What mixers int he serge system can be used to mix/offset control
voltages?

I would guess the Audio Mixer only works for audio, + there is no
offset.

does the Mix Pro work for both CV and audio(it seems to have an
offset)?

which other mixers work for both audio and CV signals?

I use the Active Processor, and to a lesser extent, the Scaling Processor to mix audio signals, both AC and DC, all the time.
You should be able to use the Mixer Processor and Dual Processor the same way.
The Active Processor is a particularly versatile little function cell, though!
With all of the ways to scale and offset voltages within the Serge system, both included at CV inputs and as separate function cells, I tend to mix and match AC and DC freely.