Maintenance for the week of March 10:
• PC/Mac: NA and EU megaservers for patch maintenance – March 10, 4:00AM EDT (8:00 UTC) - 10:00AM EDT (14:00 UTC)
that skill is supposed to do such damage.It has a cast time of nearly 10 seconds and can be easily seen (archer raises bow to the air and it sets on fire)
The "Taking Aim" skill is meant to deal a large amount of damage due to its long casting time and visible telegraph. The ability can be interrupted in order to prevent the damage from occurring.