TwShiloh, 
#dnd campaign idea:
high level characters but they’re all over the hill:
Powerful wizard who keeps forgetting what components go with what spell
thief with the trick knee that interferes with climbing and stealth
fighter who might have 18 strength but risks throwing his back out if he uses it
elf becoming near sighted and losing his archer proficiency
They’re finally going after the big score - the nemesis - a high level monster also getting long in the tooth