The old man impression was the best out of them all but very common with the raspy intake. Another way to go about it would be trying to go high pitched and get your voice to crack to appear fragile.
Skipping the second impression cause I really don't know what can help there.
Warrior could be a deeper, stronger voice to give it greater presence. You instead fell back to hollowing it out for an injured take I suppose? For your next go give it a BIG BOOMING HOWL (!) just think what would the Dohvakiin do?
"Beat"boxing at the end....way too much air into the mic just scrap that idea to be honest.