Pulling why?

[Shakiness5972]

If you want to pull 3 mobs at a time, there's the trust system for your specific needs. Don't "Force" your snail pace on other people through casual content. DPS can do your job better

So,you only option is forcing the tank playing by your own standards and if he not he should not join a party? Well, it can be said the same thing to you, don't like the pace, leave or be a tank.

In the end, none should play the game by others players standers, because they have decided how other should do and play.