Best 4 person all caster/priest group

[Gloomlord]

So then why would we want a Shaman when we could have a Druid? We don't need extremely efficient heals? I'll get the priest that can still heal small amounts of damage whilst having utility that isn't redundant, possibly another charm, snare for the Enchanter charms, POTG and some nice mobility to move this group around.

You've lost the argument.