For my ribs, I like to use a combination of Code 3 Spices Backdraft, 5-0 and Grunt Rubs along with Loot N Booty BBQ Everything Rub and some raw sugar. My go-to sauce is Code 3 Spices Patriot Sauce.
If you add more juice, your ribs will be more tender. If you're competing, be careful you don't add too much. Judges don't like their meat to completely fall off the bone. They like it to have a little bite.
Instead of grape juice, you can also use apple juice, beer or wine.
Nutritional content will vary, depending on how much mustard, sugar, honey and BBQ sauce you use.