@kgallen
I don't have much experience with multi pixel fixtures but would this work?
Select each pixel that should.come on together and record a group.
Repeat until all the required pixels are in a group.
Select the groups not the pixels.
Run the effect by groups rather individually.
Failing that...
If the effect can work on a single fixture then giving them the same address will make them behave the same but rule out treating them individually. Heaven knows what it would do to RDM though.
You can patch multiple fixtures, on different addresses to the same channel. Again that stops you treating them separately in this show but they can still be patched separately in another show
Or build an actual chase recording each step separately.