Chosen Solution

I have a very badly stripped hex screw, and it’s flush and small, and dremmeling is no longer an option due to how thin the case is, any ideas?

use a small file and score a line over and over to make a grove for a flat head screwdriver or get a screw extractor set with a small enough bit. last option is a reversed direction drillbit. it will start to drill in and hopefully catch and spin it out.