Vandal or Phantom

Depends.

If you are on a map that allows for long peeks while attacking or defending, Vandal is the one you want. Its one shot to the head any distance. For mid to close range Phantom is preem. It has a higher fire rate compared to Vandal. You might also switch between Vandal and Phantom depending on the Agent you main. Some agents play better at close to mid range combat while some don't. But above-all if your aim is on point and all you do is click heads, then Vandal is made for you.