Ok, first off is Unbreakable. Am I correct in that this ability makes you immune to damage up to a certain number? So basically that if that number is 2000, then I am immune to all damage that isn't higher than 2000 for 15 seconds? Sounds kinda too good to be true.

Also, I have a question about the crippling challenge advantage you see on a number of attacks. Does this have a chance to kick in only on the use of the power? Or does it have a chance on each PULSE? (For example, if I were to get this on sparkstorm, would it have a chance to take effect each time it dealt out damage?)

Thanks for any responses.

Unbreakable gives you a set amount of damage it can absorb in total, not on each hit...in total. Like a buffer to your HP bar, but the neat thing is that as long as you do not attack it will refresh the amount of damage unbreakable is able to absorb.

Crippling Challenge is only available to single target attacks, so be careful when looking at advantages as it is easy to mistake challenging strikes for crippling challenge. Crippling challenge works immediately when that attack is used. If you had crippling challenge on ego blast, for example, a tap of ego blast would apply the debuff and the block breaker on that first tap. There is a 12 second cooldown, however, before crippling challenge will work again. Which means that you can either refresh it on the person you placed it last, or put it on someone else.

Tip for Unbreakable: As of yesterday (I tested) using Rebuke on yourself to heal does NOT count as an attack that disables it. Along that same line, tapping Rebuke is about 25% more energy efficient, but charging it is 33% more time efficient. So if you're energy limited, tap-spam it, but if you've got power to spare, charge will heal you more per sec. 15 sec of Unbreakable is enough for about 22 taps or 5 charges. Don't waste an Imbue on it unless you can afford it along with full charges (unlikely but hey some people may have high INT/END build that can do it).

Palliate may also work, but I haven't tried it. If you have high PRE it may be a more effective self-heal than Resurgence.