Hi Joep,
Which fixtures are you using, in which channel mode? Do they have a strobe/shutter channel?
For the colour bumps I think you will have to use a playback for every chase you wish to do, as everything merges HTP. I recommend taking a row of 8 playbacks, and put all of them to "Exclusive" mode. This way you don't have to release the previous playback in the row when starting the next one.
Greetings,
Bootsy