You didn't state the size of your chain rings & cassette.
I ASSUME, you have one of the 11-3?T cassettes?
They tend to have rather wide gaps.
IF you can use a smaller largest cog, a different cassette will give smaller "jumps" between gears.
IOW, IF you NEVER use the smallest chain ring, swap the cassette and then use the smallest CR on hills.

Just figure out the smallest gear ratio that you'll need, and then calculate that ratio with your smallest ring and largest needed cog. IF you end up with a number that isn't available, use the next larger size cog.