This is a BG (Battleground) build. Phoenix Moth provides Minor Courage and Minor Force to you and your group, which allows you to free up the slot for Race Against Time (RAT) on your bar. In this build, I have Mist Form on the front bar, but this is a flexible spot where you can swap in your mobility skill—Race Against Time (RAT), Apocryphal Gate, or Mist Form. However, I suggest using Vault in this slot!
For the Focus Script, I recommend using a burst heal. For the Signature Script, you can go with Class Mastery, Thief’s Swiftness, or Crusader’s Defense. Finally, for the Affix Script, I would suggest Minor Vulnerability (if you chose a damage focus script instead of healing), or Savagery and Prophecy.