Here's what I've found... just from my own experience of almost exclusively listening to TFS most of my days..
If you were setting up for only one site at a time in Toronto, the South is the one to try and get. The automated Dispatch I've only found is consistently on South. Sometimes it is on West.
Generally trucks stick to their respective "home" site, I've found. If it's East Command being dispatched to an East Tac channel, you'll find it on the East site. If it's north command, it's on North. You generally get tac channels on other sites only when a truck goes over to help and affiliates to that talkgroup - such as a South Command truck going to East tac 3 to a call, then you'll get it on the South site.
I've found the "Ops" channels seem to be on most sites though.
Most major calls end up being heard on the South site though once they get big. I mostly monitor the south on my G4 and hear most significant calls coming through there if it turns into anything. Otherwise each knob position is setup for tac channels on their respective site.
For the OP as well: The first system you created there called "Toronto" with the backup frequencies / fireground you could leave out - you'll hear everything on the trunked system. Do you pickup the South Site well from where you are? Try using a site hold on the South one.
How to do it; just in case you aren't familiar with how, since you are new to the scanner: