Hi,
I usually do the chases using a sequence of [wave generator] shifting the phase depending on the amount of fixtures in the chase. The limit-scale allows me to set the max-min intensities of the chase.
I also use a Javascript actor to automatically assign the phases: This is actually not really needed since it's generally a one time job and you can do it by hand.
I hope this was clear. Don't hesitate to ask if I was not clear enough.