Hi @ask,
Sorry about the delayed response. Yeah there’s a simple way if I understood the underlying ask of your question correctly…
Instead of running the list processor on one of those inputs, run it on a list of numbers (for this, you can output the current cells index as a third column of the repeating group and run on it).
Then you will be to access other columns values concurrently using
Column 1’s item # This’ list processors’ current value
Column 2’s item # This’ list processors’ current value
Thank you for the feedback!! 
Glad you find the utilities useful