Quickie: Stop searching for a sense of purpose. It will find you when the time is right.
Overview: Your abilities are almost superhuman. The only problem is that some parasitic types think that means they can lean on you to clean up their messes. Show them the way, but don't perform their tasks for them.
If you've been looking high and low for a true sense of purpose, stop the search. You are not going to receive some sort of mystical sign from beyond as to what you should be doing with your life. Instead, pull your focus in and examine the things you enjoy -- because enjoying life is as good a purpose as any. Spend your time exploring whatever gives you the biggest sense of accomplishment. This is where you will find what you've been seeking.