The lighter shore jigging has been working very well for us in Southern California, we've been able to get all of the local species off the surf with 10-20g jigs and these are the perfect hooks for them. The double assists can go on either side of the jig but we generally see the top hooks get hit more.
Since these are also stronger than some of stock hooks that come on the smaller jigs you can fish heavier line up without worrying about the hooks.
The smallest #3 size works well for jigs in that 10-20g range, the #2 works well for 20-40g and the #1 works well for 40-80g.