Returning DK, no clue what to do.

Um..I'm back to maple too, except I have been gone for longer, like almost 2years. I have no idea what to do on my pally. I see we can stack lightning charge and other charge now, but how do I get the new skill combat order? And how do I get a SP reset? And is there anything happened to zakum helm? I don't quite remember if I destroyed it on my pally, but apparently some of my chars still have it while some of my chars have it gone @_@