I would use 200g/mē carbon and 100 or 160g/mē twill glass, because that is what i have in the garage. It dosent matter, as long as you sand properly, so the new laminate has good contact with the old laminate. Use strong tape and perhaps peel-ply to create pressure. best would be with vaccum pump , but not necessary for such a small damage.
Beware of epoxy! use double latex gloves when you use it, never breathe the sanding dust.