1. Open up your action menu and it will show you all 3 lines of actions (this will help you locate all your actions currently equipped).
2. To move your action slot 1 equip an ability in a different slot to 1, this will automatically swap the 2 actions. For example if you have "Cure" in action slot 10 and move it to action slot 1 then "Phantom dart" will swap to action slot 10.
3. If you accidentally moved your action 1 slot then you could always equip it back to 1 then it should swap both automatically like the poster above said (if for some reason its not working open up you action menu to find out where "Phantom Dart" is then equip what ever is currently in action slot 1 to where phantom dart currently is).
For example in the paragraph 2. example to move phantom dart back to action slot 1: /eaction 10 "Cure", or /eation 1 "Phantom Dart" (whatever works)
Edited, Feb 3rd 2011 3:50pm by kumago