I do not agree with leo1925 about the reletive time taken to adapt a AP compared to running a npc. But these are personal opinons. You have four players, which is what the AP is designed for. Make minor changes, and let the chip fall. Maybe next time they will act like a team. If they cannot co-operate to create a party, will they act as a team in the AP?
It's more a matter of "lack of experience".One player has many years of experience...but is something of a "power gammer"
One has about six years experience...but is more focused on roleplay.
One has two years experience...and...well...he's the kind that always plays a "kender" regardless of actual race and class.
And one has one year of experience...but started as an eighth level Cleric...which was a bit overwhelming for a new player.
Several are indeed very "head strong" and want to be the one that smites the baddy (funny no one ever plays a Paladin)
The NPC I am thinking on is inspired by Sage/Tessa (with some Sherlock thrown in for good measure).
Expert 5, then into Sleepless Detective.
She is not meant to solve the problems by her own power so much as able to advise and give them the information they need to hopefully learn to ACT as a team.
EDIT: Although the NPS is not a caster, she is meant to have a high UMD (she has the trait that allows her to use Int instead of Cha for UMD)
I'm hoping to equip her to handle some of the effects that they are lacking spellcasting options to counter.