Well send me your spare 64 :p
But in all seriousness, need a few questions answered first
A: are you using an analogue split, or do you want the monitor console to copy from your idr10? I assume you are wanting a split from your idr10 otherwise there would be absolutely no reason to network em.
So, The remote audio card has two ace ports, I believe you can just run from that second ace port directly to your monitor console. But I assume you are wanting the additional dsp power? That’s what the idr0 is made for, but as you have an idr64 you can use that instead. Am I right n assuming all you will be using is its outputs?