Spoon size just depends on your gear size. I used to throw a 10' Ugly Stick surf rod with a 14000 Shimano reel- 3oz silver spoon. The fish didn't care- they'd hit that big old spoon anyway... I'd throw it off of the point as hard as I could.
I liked the smaller bluefish. I'd stick my knife in at the anal and slice them clean up past the gills and bleed them out on the beach (usually piercing the heart). Pretty good eating, especially fried, or throw them on the smoker whole!
We were using live shrimp last month fishing the jetties at Perdido Pass for bull redfish when they showed up- thick as thieves! I could have taken a boat load!
Here is a pic of a few I nabbed at the Perdido Pass Bridge off the kayak! You can tell that pic is a few years old! No gray hair!
We have had pretty good luck there under the bridge with some shrimp- just make sure you have a piece of steel leader- or they'll cut you off... nothing big & bulky. Some thin wire to keep you from getting cut off, after all- these aren't 25# monsters, mostly 3-4# or so.