OK, in no particular order...
Your routing looks fine.
For tidiness' sake(!), you don't need 4 audio channels on the Kick track (track 2) - change Routing track channels to 2
On the Kick track, mute the routed send to the Kick Low track for now.
Your ducking compressor (ReaComp) needs to be *the last FX in the chain* on track 11 (Bass). Bypass any other effects on the bass track (unless your using a bass MIDI VST, in which case, don't bypass that!)
For now, bypass any other FX on all tracks (shift-click each in the mixer view)
Solo the kick and bass tracks, bring up the ducking compressor on the bass track, make sure 'Detector input' is set to 'Auxiliary input L+R', then click the "Preview filter" and hit play. You should hear the *kick* drum coming through your bass track (you're previewing what's coming into the sidechain compressor). Set the ratio to 4:1, and lower the threshold until you get 6-9 dB of gain reduction on each kick thump. Now uncheck the 'Preview Filter' checkbox so you can hear the bass again.
The bass track should now be squashed with every kick hit. If it is....
- unmute the 'Kick Low' send... bass still ducking OK?
- enable each of the other FXs in turn ... still OK?
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