Crippling Slam

During the Grauberg Augmenting Item fight, I think I've noticed something. As a SCH, I dot the NM and force him into 75%, making him 2hr. At this time, the NM gains the ability to nearly 1 shot anybody. So I force the NM into his first 2hr, and the Sentinel Wivre use Crippling Slam (Heavy AoE damage). And I've noticed this many times when fighting this NM.

So I believe when the NM uses his 2hr, not only does he gain access to Skull Bash, his Wivre gain access to Crippling Slam. Any feedback or support would be great on this.

Never seen this, we usually kill the Wivre while the NM is being kited around the wall, then when they're all dead we kill the NM..

Edit: Didn't read your post fully, never had DoT on the NM, so no idea :o Good find