The strikers are an adventure in themselves. I would try 1 piece first strikers first, 2 piece strikers are not that hard to make, but until you learn how the density of the wood work on the calling surface I wouldn't recommend trying them. The tip, the density of the wood, and the weight all determine how it plays the call.
The most important thing about turkey calls is the sound, but it is not an exact sound that has be duplicated on each and every call. Each hunter has a perception of the perfect sound or an idea of what they think is the perfect sound. It is up to the callmaker to come up with the what he thinks are the perfect sounds. This is done with both the call and the striker. With the call you have the type of wood, the calling surface, and the sound board, then you have the actual construction of the call, the final measurements are what makes a the sound what it sounds like. Change the wood with the same measurements and you have a new sound. Then you have the variables of the striker. It all takes experimenting until you find the combinations that sound good to you.
I have made calls that I thought were awful, other people liked them and some hated them like I did. On the opposite end I have made calls that I thought were perfect and then had people tell me they were awful sounding. Sometimes all it takes is a different striker to get that sound sometimes it takes the right person to pick it up and say "Wow this is good".
I hope this didn't confuse the issue too much, but with most calls the perfect sound is not determined by some 'god" but by the hunters and the callmakers and they will almost always vary on what is best. That is why with callmaking you can march to the sound of your own call, if you like go for it. If no one else likes it and you have a lot of calls to use, then you might want to rethink the sound that you thought was perfect.
Marvin