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Pocket holes are an extremely strong form of joinery when combined with glue. The holes can also be concealed with plugs if partially visible. This is a go to for face frame construction and even works very well for exterior window and door casings to prevent the seams from opening up with changes in seasons.
I would recommend using a narrow crown stapler vs a brad nail on the bottom if you are not able to do a traditional dado. The holding power is far superior and little chance of failure down the road.