46/34 and either 11-28 or 11-32 11 speed SRAM cassette. Would prefer 48/36 but those don't exist (Rotor Q Rings). Usually don't need more than the 25 cog and always bring one extra just in case. If I think the 25 cog is enough, I have the 28 on the rear. If I think I need the 28, I bring the 32.
At 320 watts on a 14% climb that we can have in the East, I am doing about 5 MPH. At 200W, it is more like 3.2 mph. What is that about 50 rpm and 32 rpm grinding the 34x32 gearing. That is why I prefer to keep long climbs to no more than 10%.
I did find some FSA 48T 110BCD rings. Bought 3 of them when I found them. They are out there on Fleabay, but rare.