I popped a mutable peaks at the far left of my isms trying to push myself to use the mixer a little more. It's pretty convenient to have it really close to the trigger sections of white whale / teletype / meadowphysics and when i was just using it for drum sounds it was nice to have it out of the way of the rest of the signal path.
As an audio mixer I used the mixer section to mix the 2 drum outputs. Mixing CV it was a lot of fun combining LFOs, envelopes, noise or step sequencers coming out of Peaks or the LFO and noise section of isms.
Although it is located on the far left. It was pretty convenient to either run the mixer output through a longer cable to a mod destination in the middle of my rack or to use the bus to jump down further or attach the mixed drum signal to the output section
I would like to push a little further and figure out more uses for the + and - inputs