one thing has not been asked here is your need to use both the H8000fw and the motu828.

it looks like you do not need the motu at all, if you want to use the Harmonizers converters.

i would suggest to disconnect the Motu, and make a new routing starting from Routing#26 Firewire

A | | B .

In my current setup i am using the H8000FW in Firewire mode and connect the analog output to my monitors. I use DSP A and DSP B in parallel , receiving the 2 stereo processed signals in my sequencer, use them in the mix, and sending the whole main mix out a different firewire channel to the Analogue out of the Harmonizer.