That’s asuming you even get those, which is what one of the videos above looks like, the resto guy looks like they took the dot ones and the feral went straight convoke damage.
Best I found was going the generic powers and just tanking it. I also found that you can cyclone the bosses at the right time, re-cyclone and eventually they drop their stacking buff, once I figured that out and when you get a single target boss it’s actually quite easy in tank spec.