Just to be certain, regarding this statement in your resource page,
 
When not to enable,
"The project uses a Mixing Latency Buffer Size setting under 256 samples in Edit > Preferences > Audio - Driver Settings"
 
While I seem to be well balanced across my 12 cores indicated anyway so haven't enabled this yet, typically my "mixing" latency is cranked up to the max 2048-4096 at 96K, and set number of buffers to 128, just to avoid midi dropout issues. However when recording I would probably be below 256, and probably not many FX applied to original recordings anyways (Id use audio interface mixer FX if I wanted to monitor, say vocals with reverb). If I need to add tracks to a project heavily endowed with synth and FX, Id probably export/bounce them to a temporary project file to create the new tracks, and then import new tracks back into full mix project.
 
Anyway the question would be, if I were to have load balancing enabled for "mixing", should it be disabled, "unchecked" when also lowering latency below 256 in preferences when recording?
 
Cheers
 
   
 

The notes there are general guidelines. The feature is adaptive so using the default settings it typically will dial back when the latency gets lower so you don't need to disable it necessarily. However its very hard to predict load since projects can vary drastically depending on used plugins. Presently the best way is to keep an eye on performance and use when necessary. In the future we'll improve it to be more automatic and intelligent.