First off, remember, he has wings, he has to flap those things to fly, he isn't built like a bird or other avian creatures to where he can just glide or ride air currents. Flying for this character takes as much if not more energy then walking for the normal grounded person.
Second, if ya got hands you can use bows and the such.
Third, spellcasters spellcasters spellcasters.
Fourth, other flying creatures, yrthraks(sp?), dragons, harpies, hippogriffs, griffons, night shades, or anything else that can fly.
Fifth, ground him by going underground or underwater.
Sixth, ground him some other way, use burrowing monsters with tremorsense and use hit and run tactics.
Second, if ya got hands you can use bows and the such.
Third, spellcasters spellcasters spellcasters.
Fourth, other flying creatures, yrthraks(sp?), dragons, harpies, hippogriffs, griffons, night shades, or anything else that can fly.
Fifth, ground him by going underground or underwater.
Sixth, ground him some other way, use burrowing monsters with tremorsense and use hit and run tactics.