I've tried many things over the years and no matter what, I always get into a situation I'm not prepared for. I have about 7 active scanners at my desk (Mostly BC780's, 785's). I usually program 2 with my local stuff (my town & county). The others I program for events further away (but I have a local bank in each). When something big happens, I usually put 3 or 4 of the scanners in manual mode locked onto a freq or talkgroup being used. So one will have highway patrol another will have lifeflight, another will have whatever fire dept is in use, and another for county of city PD. The other scanners will be scanning for other agencies that might be involved and one unit will be scanning for events not related at all, just in case something even bigger goes down.
So my philosophy is 'manual mode' thinking. I want to be able to lock each radio on a separate channel so I don't miss anything.
As a side note, I think the ultimate dream scanner will someday have the ability to network with multiple scanners so that if one is stopped on a channel, the others would automatically skip that channel. No sense in having 5 scanners all playing the same audio while you miss the other action. I wish I were smart enough to figure out how to do it. The networking features would be almost unlimited (especially with a computer in the mix).
Uniden? You listening?