Engineer: 100% Calculated

 is a challenge in Risk of Rain 2. It is completed as Engineer by defeating the Teleporter Boss in less than 5 seconds after it spawns.

Tips
The challenge can be difficult to achieve without planning ahead. The following can make it easier to achieve:


 * Using a with a lot of on-hit items is a good way to reach enough burst damage to complete this challenge.
 * Using burst items like or  in combination with couple of  and.
 * Using the and teaming up with a high damage character such as Artificer and/or Loader