Best 4 person all caster/priest group

[Gloomlord]

You say they "don't care about DPS".

But even if this is true, why would they pick shaman over mage if they were going to have a 4 man group of friends exping to 60?

We also established that the people in question know what they're doing but have human limitations on stamina. Mage is an obvious choice over shaman.

Do I really need to provide "evidence" about the overwhelming majority of people not wanting 2 idiots in a 6 man group doing their own thing? Even a bad player can see how obtuse that is.

You've lost the argument. There's no getting out of this.