Fx directly on audiofile

I was thinking that it might be a good idea to be able to have the sound FX have somewhat less echo/reverb than the voices when in the cave, just so they would sound clearer, (by setting different send levels for each), and having the two main elements on separate group busses also gives you the ability to quickly and easily adjust the balance between the voices and the sound FX with just two faders.
 
In my example setup, the Voices and Sound FX busses would be considered groups or subgroups, and the Reverb/Cave bus would be considered an aux bus.
 
If you have any other scene locations that require different reverb settings, you can of course setup more aux busses and add more sends to the subgroups, most locations however will probably not need this type of plugin processing, when in a house, or outside in the woods there really wouldn't be any reverb/echo needed right?
 
When do you need to have this project finished by?
 
I hope you can get it done in time.

At this point you should have all of your tracks routed out to one of two buses, either Voices or Sound FX, this routing should be done using the In/Out controls, each of these two buses should have sends on them for each of your scene effects buses, all of these sends should be set to post-fader and turned down to -INF.

Using the little double arrow icons located on the border of each view element, collapse all of the open views, (the inspector, the browser, and the console which should be in the multi-dock) so that only the track view is open, it will now be the main work area for this automation.

In the track view, on the bottom border under the track controls there is a button that opens and closes the bus pane, this needs to be set to view the bus pane, then grab the horizontal divider and drag it up until the bus pane is taking up most of the view.

Double click in an empty area of the track controls area on the voices bus and it will expand to take up the whole visible area of the bus pane.

On the top of the track view there are two buttons, standard and advanced, select the advanced button and all of the controls will become visible.

On the voices track controls there is a button that says "None", that is the automation envelope edit filter, click on it, and in the automation menu there will be one that says Cave Send Level, clicking on that will make the envelope for automating that send level visible, you can now add nodes and write your automation.
 
Place the cursor on the timeline where you want the "cave" effect to start, and create 2 nodes about 1 second apart, then grab the node to the right and drag it up until the send level is where you want it, at the end of the scene, create 2 more nodes and drag the one to the right down to -INF to shut off the cave effect.