Not sure if this is the right place (PF vs DF)

[Garlyle]

If your tank was trying to grab adds on the Copperbell boss, that's players not actually knowing how the bosses work, not a non-standard strategy, as mentioned. And it's a good reason to speak up when you're doing something you're unfamiliar with (it is Copperbell though, where the damage is hilariously low)

Speedruns don't really happen in low-level dungeons, especially not in Duty Finder. Largely because speedrunning the level 50 dungeons is reliant on the fact you can be 30 levels overgeared for them to create the power gap, it's actually very difficult to speedrun them. You only get two types of clears - full clears (all rooms, chests, etc.) and quick clears (skipping unnecessary trash/treasures/side rooms but that's it; mob groups will still be pulled one group at a time almost always).

The ONLY time you see 'speciality' runs of low-level dungeons is when they're specifically organized - largely because they arent practically via Duty Finder (Dzemael Darkhold EXP runs, for instance, involving clearing all the trash mobs in the first leg, abandoning before the first boss, and re-entering the dungeon).