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With that sprocket in mind are you sure you want a lower stack headset?
I usually use 12-28 (10spd) with 52/36 and it's sufficient 98% of the time but I do lot's of weekend group rides into HC and Cat 1 mountains and depending of how tired from training in the weekdays or how many days of riding the group will do it's good to have the option to go up to 32T. What's the downside of having a long cage tho? Can't really see the upside of a short cage RD tbh.
With that sprocket in mind are you sure you want a lower stack headset?