Every time I have seen mixed cabs used by big named bands, the basically mic 1 of the 410 speakers and mic the 115, then blend the two at the mixer. I use that technique when I record as well. The thought here is that you should not use this combination because 1 will be starved/not heard over the other. However, in most gigs I have played, my stage rig wasn't to provide enough volume to be heard by the house, but to provide the tone that I need for a solid mix. What say ye?