It's mathematically impossible for single targeting to out DPS mass pulls. On BLM for example Flare on 3 targets is effectively just over 1000 potency. That's more than Xenoglossy or a Thunder 3 proc.
The time saved from AoE's doesn't have to be the motivation for mass pulls anyway. I don't care how long my dungeons take, but I always prefer big pulls because they're simply more interesting and in addition, optimizing is fun.
A common opinion I see is if the majority of the party wants to go fast, that should override the rest of the party's opinion. I don't agree though. When you queue in for a dungeon you're basically saying that you have enough time to complete it no matter what party you're matched with. Going in with the expectation that people should follow your particular standards is definitely unfounded. If party members disagree on how to handle the dungeon, try to work it out. If that fails, then kick for different playstyles or leave and try the PF where you can restrict entry to suit your needs.
I agree. The second heal I try to cast as WHM is Benediction (first is Assize but I'm using it more for damage usually at this point in the dungeon), so on the first pull I'll let the tank get pretty low to get the most out of it.
