Great advice by everyone else thus far.

As for your string accessories, I cannot say exactly how much those string jax slow your arrow speed down. Rubber "cat whisker" string silencers can slow arrow speed down significantly, 8-10 fps, depending on the size and location. Both the string leeches and the hush kit "squidees" result in marginal speed loss, 3-4 fps, again depending on where they are located and how many you have installed.

The WB, assuming it is a newer model, should only reduce arrow speed my a max of 2 fps assuming it is properly tuned and you aren't using an extremely aggressive helical on your fletching.

Hope this helps.