After reading over these bad boys let me show you something that you may or may have not thought about.
You hit a unit with the markerlights and get them below half. You then use the rest of the tokens to give that unit a -1 leadership per token. This will get give you a better chance of making them run and never regrouping.
Tactic vs deamon packs. You kill 25% of them and stop shooting. You then take the rest and put it on their leadership. I believe you can kill more this way then by just shooting them down. ie Leadership 8 can go down to 3 and he had better roll low.
If you pop the vessel that holds the Greater Deamon can you do the -1 leadership test for his Instability test at the end of the Chaos Players turn or is the -1 leadership only during the shooting phase?