3/16th oz. is about as heavy as I like to throw on the rocks with smaller worms and baits. Tungsten is better than lead because it is smaller and provides more sensitivity. With that said, until you get a hang for the feel stay with lead or expect the need for deep pockets. Until you can figure out the feel of the rocks you will lose many rigs but eventually you can move to heavier stuff. Losing rigs is just the cost of learning and catching on the rip-rap bite.
The weight is relative to the type and size of baits you throw. A 3/8 oz. weight pegged to a 10 inch worm may be more snag-less than a 3/16 oz weight and a finesse roboworm. A wide beaver style bait might hang less than a zoom trick worm.
I have found that all shapes tend to wedge to some degree and that football was not really better or worse than others on true rip-rap. Lighter line, lighter weights and more sensitive equipment will save more gear because it becomes a "feel" thing that comes with experience. Good luck!
The good thing about rip-rap hang-ups is that if you can get on the back side of them they usually pull free as long as you have not wedgelocked them into the rocks.