I usually use a 1 ounce head, that is what I am used to so that is what I throw most of the time. If you are fishing shallow, less than 5' I would down size the head, probably go with a 1/4 ounce screw lock type head. The lighter head falls slower and gives the fish something to react to and still be able to see on the fall.
The Shanghai assassin from
www.moestackleshop.com is flat out killer in this application.
Take a little extra time when you rig the body to the head, try to have it centered in the body, the lure lasts longer and it falls without twisting the line.
Vary the retrieve and pay attention to what you are doing so you can repeat the one that works.