As a young teenager fighting I loved using the standing kimura in a good ol' neighborhood scrap. Would this be wise to use in self defense when the opponent is trying to kill you? I'm thinking about going back to training them for street fighting purposes.
Second only to the greatest BJJ street fighting tactic known to man woman and child....pulling spider guard.
Sakuraba actually perfected them fighting Helio Gracie in the mean streets of Brazil. Standing Kimuras FTW.
I see your kneebar and raise you a flying scissor heel hook. I used it once on these three thugs that were following me home from the bar. Then the biggest of them gave me his keys and said "my wife is in my car; you deserve them both more than I do." I don't know if that answers TS's question though.
If you are confident of completing a standing kimura in a wide open area then you should have already pile-drived them and walked away.