I have some stereo pedals. I just run those to the Pathfinder and the main signal to the AC15.
So the 'wet' out of my WH-1 goes to the stereo out of my Line 6 MM4 (modulation modeler) to the stereo out of my Line 6 DL4 (delay modeler) to the stereo out of my Line 6 Verbzilla.
I've also done this with the stereo out of the DL4 (not using the stero out of the MM4) goes into the Verbzilla mono and that to the Pathfinder with that being the only input into the Verbzilla, keeping the octo/shimmer tone only to the Pathfinder and not stereo between both amps stereo.
And I've ran the dry out of the WH-1 to the Verbzilla with just that in the 'B-chain' to the Pathfinder, while leaving the 'A-chain' as all of the other effects/tones. This method is nice as then I set the amp for the level I want for the smimmer, which in this setup shimmer would be the only effect going to the Pathfinder, and I can have it at a level that mixes well with the main signal.
Variety can be involved, on the cheap, with just a little experimentation.
Otherwise all pedals go from the 'dry' out of the Wh-1 to the mono out to the AC 15CC.
That is where the Whammy works great for me - in that I can send those 'wet' and 'dry' to different amps. (Wet = effected / Dry = uneffected tone).
In that wa, it was a cheaper option to use the gear I have in that way instead needing a splitter and spending more money.
Is my method a 'poor-man's fix'? Sure but it works pretty well.