I have a few patterns I always have on my boat that I can buy or tie myself.
The first is a baitfish pattern. The EP Campeche minnow and the EP black and purple small peanut butter fly are two of my favorites. This small baitfish patterns work under a lot of circumstances.
The second is a crab/shrimp pattern. I like pink and tan flies or even black and purple at times.
The third is a popper. These can be simple foam head poppers with a tail of different materials. These are probably used the least but are a lot of fun when the redfish key in on them.
With these few patterns I am confident I can catch reds anywhere under any situation.