The trick I use is this. I take the top track and figure out which shots are the very best, and I set the opacity to zero for everything else. I then do the same for the second track. Then the third.
Then when I play the sequence, All I have to do is worry about any overlap or any blank spots.
You can poke out the eyeball to make any track not visible so you can work on the track below it.
Another way to handle this is to set each track to 50% of it’s original scale and adjust them so they all fit on the screen. That way you can see what you are doing easier. But this tales a PC with some power.