Trash packs don't tend to live that long when I'm in the party; the effect of BfB on Doom Spike is glorious
Nonetheless, as DRG's formerly excellent AoE has fallen in relative status (i.e. dungeon mobs feel a bit tankier they did in most ARR dungeons), and the last few DF experiences I had were really sour, I've been doing fewer dungeons in general, so maybe this latest pair is different.