To quote an individual from the AR: After finally placing following many attempts: "I told you this was a sauce contest!"
There is no accounting for the judges' taste. Sauce can help, hurt, or be ablsolutely neutral -- I taste what's there but I'm looking "under" the sauce - and I've had nasty meat with even nastier sauce a couple of times.
So far I am convinced there is NO SILVER BULLET in competition. You cook your best product and turn it in!! Second guessing will just lead you down a long, dark, lonely trail!! :D
If you find a sauce you like or create or modify then use it. Don't lose sleep looking for a magic sauce.