Mate the iron cove can be productive at times try using a burley. Get a bucket get some bread, chicken pellets, tuna oil maybe some old pilchards mix together with some water and throw in hand full every now and then. This brings the fish to you. Sometimes worthwhile having a rod with heavier line similar rig to the one you mentioned but with 2 hooks around a 5/0 with a pilchard or squid might be lucky to pick up a jewy just leave that one in water wile you have fun with bread butter fish on the lighter line using prawns, worms, small squid or chicken. Also there are a lot of different spots to try there try under bridge both sides or off ferry wharf or if you on city side looking at water look left there's some rocks going out into water try the end of them. Good luck