I would still like to try it. Someone said it worked well for them, but there wasn't enough detail. 1k across data and clock is what the said, but is that across one another or to ground?
Probably data to ground and clock to ground.
I did this with a neopixel strip which has only 1 signal though.
Values , hard to say its suck it and see with an oscilloscope really, tweak until ringing is reduced.
But if you are able to control your strip OK its not necessary.
Once the first LED gets a good signal the rest of the strip regenerates the signal anyway.
Normally only a problem with long data feed wires.
I haven't tested this. But if I set up the LEDs to only get written once in setup, will that achieve the same thing?
The reason i suggested it is once they are on , physically disconnect the signal wires.
That may eliminate any possible glitches from the arduino end being the culprit.