Hi Leslie,
I had a setup similar to yours. Power meter with rollers.
I used to adjust the resistance of the rollers depending on whether I was on a recovery ride or a race, or somewhere in-between.
If you find yourself spinning out on a certain setting, then increase the resistance. Having a power meter gives you a choice, I wouldn’t say there is a right or wrong approach.
Ben makes a good point on changing the resistance from time to time (if the differing settings are usable for you) in that way you can avoid wearing out a single gear or couple of gears. (with that in mind, check your chain (cheap) for wear now and then so that you can change that, before it causes damage to the cassette (expensive))
Have fun.