mullet can be a bit hard to hook sometimes but a rig that works is tie a large dropper in 2kg line cut it tie on 2 fly hooks 1each on the tag ends use a bubble float a only a shallow depth just bellow the surface burly with bread and with a doughy mix of fresh bread used for bait use fresh bread because it wont need to be mixed with water use only the tinyest ball and pinch it just on the barb an as the mullet takes the float wait till the bow in the line straightens swiftly strike at it have only the smallest splitshot because a bubble float can be 1/2 filled withwater and used as acasting weight and this method should work for you but mullet can be made to take a bread fly aswell but someone else can explain that as I dont flyfish alot good luck in your pursuit of the sometimes elusive mullet and let us know how you go so I might come get some for my marlin baits.Dont forget to go were the fish will be I'm sure you are aware of this as mullet can normally be sighted if you can see the fish that would be an appropriate place to wet a line as long the tide isnt to fast then fish upto and after the ebbs as per normal with most estuarine fishing the ebbs are the times to fish.Cheers anyway Emu