After a year or so of tweaking a climbing setup I have settled on 40/24 with 12/28. 10sp Sram road/mtb mix.
On the flats I tend to sit around the middle of the cassette which I like. The three most used middle cogs (and higher) have 1-tooth jumps.
Prefer having a cassette with minimal jumps.
One I run out of gears on a steep downhill I just coast.
The times I do a light bikepacking ride, that 28t is just enough for me.