Let me start by saying that I am certainly no CJ expert and I'm not picky about who does what, I would just like to make a suggestion to those that might not realize something (possibly due to inexperience or maybe its a really little kid behind the toon).
I noticed on a number of CJ runs that when I'm stunning a set of cogs (like 3 or 4) there will be another toon stunning the same ones. I think this is counter-productive because:
There tend to be about 6 other cogs down the line that are not being stunned at all...therefore, we are missing out on the bonus weight and toon ups, in addition - those cogs are targeting us with evidence as well as adding weight to their side of the scale.
So please, make sure that the cogs you are trying to stun are not already being covered by someone else. If they ran off to get evidence or whatever, then that is a different story.
That's all

I hope that helps. Obviously, if anyone who has more experience has something to add to this (suggestion/correction) please do.
Thanks and have fun!