On The Buses
Once you’re happy with the sound it’s usually a good idea to combine your layered kicks into a more manageable single track of audio. This is easily achieved by routing the samples to a shared kick drum bus (or group).
Routing the separate tracks of audio into one mixer channel allows us to EQ and compress the layered kick as if it were one sound. It also makes it much easier to balance the levels of your individual drum elements – you’ll only need to adjust one fader to control the level of the layered kick drum, rather than adjusting each layer separately.
Finally, once you’re happy with the sound and processing you may find it more convenient (and slightly more efficient in terms of CPU and RAM usage) if you bounce the kick drum layers to a single audio track or resample the layered kick as a single sound:
As a final point, at this point you may also want to edit your bounced kick drum into a single sound to add to your personal sample bank. Doing so is a nice way of growing your sound bank over time – you can then simply dip into it whenever you need a similar kick sound in future.