I couldn’t clean or change my internals(thermal paste) for the past 2 years on my ps4 slim because of a single stripped screw which lost its screwdriver grooves. Also the heat plate on the back started corroding.
I would try a tiny bit of superglue between screw driver head and the head of the screw. Don’t glue the screw to the metall plate it is holding. 
Why was i thinking about circuit welding and weld screw on top of the stripped screw and not about superglue damn i will try fr sure.
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grinding tool and flat head driver
Isn’t that an overkill for a screw of that size
Try using an elastic band between the screwhead and screwdriver