Stereo/Mono, 2 amps using effects loop

[IndianRunner]

Decided to pick up a Catalyst 100 as a backup amp to my main tube amp, then got to thinking for home use, how can I use them both to widen my sound? The effects I'd need L/R so to speak are a dual delay in the POD GO as well as the dual pitch effect. The goal being to have a short delay included in the L and a longer delay out of the R amp, as well as have a + cent pitch out the left and a - cent pitch out of the right amp. I don't want to mess anything up in either amp or POD Go so I thought I'd ask what the best/safest setup would be to get that accomplished. Is it possible to use a 4 cable setup and just include the CAT100 in the effects loop by sending the R output directly to AMP IN on the CAT 100?

 

Already using 4 cable with a DSL20CR, just trying to use the CAT 100 as the R side with separate delay and pitch. I can accomplish this just using the Micropitch as I can send a separate A or B to either amp but them I'm using the preamps of both amps which I'd rather avoid if possible. I'm also assuming the dual effects like a dual delay and pitch can be separately assigned one delay to L the other to R and same with pitch from the POD Go using dual pitch.

 

Any idea?