Large pulls VS Small pulls... in leveling dungeons?

[Conquistadork]

I don't mind when they do big pulls in moderation, but some tanks seem to feel like they can take up on the world themselves and do massive pulls, it's pretty annoying both as a healer and as a melee DPS. As a healer it gets really stressful trying not to let the tank die, and if by some mistake one of the DPS gets hit by an AoE it gets worse. (I do admit that the challenge of keeping them alive is fun, but it gets old after a few pulls)

I like fast runs but sometimes they need to go a bit slower to let the healer keep up, I've seen tanks die a few times where they kept pulling mobs and run ahead of the healer while he tries his best to catch up with him trying to heal, it's kinda funny to see tbh.