Mage skills doubts

I have some doubts about the skill descriptions.

Searing Curse

Affected targets take an additional 5% damage.

  1. Do I need to charge this skill?
  2. How does it work? Is it when the players attack the monsters? Is this when the monster attacks the players?
  3. With Curse Mastery, curse increase damage taken by 20%, for 7 sec. But when I activate Searing Curse, damage taken does not increase to 25%. Is this a bug?


Quitting Time

Applies an additional 20% damage to bosses in the Time Shift.

  1. This additional damage, is it when players attack the Boss? Is it when Time Shift falls crushing the Boss? Is it damage over time?


Chronologist

Boss monsters lose 10% armor when in the Time Shift.

  1. Do I need to charge for this to work?


Extra questions

I don't know if these upgrades are affecting the Boss. I don't see the red armor loss icon. Could you test these three (Searing Curse, Quitting Time and Chronologist) and tell if they are being activated correctly?