Guild Wars 2

Is that only me, or he is just regularly ignoring CC applied to him during his regeneration, unless you fully deplete his breakbar? Before HoT is was enough to just apply any hard CC on him, but now this happens more and more often.

Yeah, dredge final boss is a bit weird when it comes to interrupting its healing. For ele, Warhorn Cyclone interrupts it while staff Gust does not.

Generally you need to deplete his breakbar now to stop the heal.

As long as the boss has the Superheated debuff, any damage stops it from healing. No need to deplete the breakbar if you kite the boss accordingly to each bucket.

It is not necessary to deplete his breakbar. If you want him to stop healing himself while he is not overheated, you only need to use one CC which pulls, knocks back or launchs etc.
More specifically you need to use a CC that will change the targets location if it had no breakbar. (Didn’t test “Fear”…)
E.g. stuns and knockdowns will not work to interrupt him.

If you played it on T2, you might have had issues with the “enemies get boons on crit” instability, bosses tend to get a lot of stability stacks that negate incoming cc.