If you're going to use braided line, why use such skinny line when you could use a line that has the diameter or 20-30lb mono? What's wrong with using mono? It's the most commonly used line. I don't think you really need braid unless for some reason you're pretty darn well sure that you're going to catch a beast. How about trying some Dacron if you have lost all faith in mono. Besides, I'm not surprised if the rockfish you hooked dove for a kelp patch or if the line was cut by a barnacle or mussel. I don't know how you fought the fish, but I'm sure you know that allowing the fish any quarter is going to cost you.