Second, you get containment for them being under the mez effect (hold, sleep, stun & immob in this case).
If they aern't mezzed with one of these they aren't Contained.
It doesn't have to be your own mez effect either, anyones mez will do. Some mobs in the game (turrets & portals) are defined as being perma-immobed which means your own attacks always do double damage on them.
Your Controller holds have a 20% chance of Criticalling too so that they can hold a boss with just one application 20% of the time.
Thx for the speedy info!
If you want quick containment on a mob, good thing to do is hit them with an immobiliser 1st.
Sorry for the newbie-ish question, but is containment in effect if the hold hasn't broken through the target's mag protection? That is, if it takes two applications of hold to actually hold the target, do you get containment after the first or second hold?
Thanks!