Based on how I'm reading the scene, it seems like Amalthea and Taniwha are acting as the face of the party right now, but they're not so far ahead that it counts as a party split. I think Taniwha is freely going back and forth to engage with the party, as seen when he
Mathfuric says:
pulls his hood about him and hesitates, looking for advice or guidance form the others . . .
It all just depends on how each individual interprets the stage direction of the scene, but I want to err on the side of keeping the party together and avoiding a party split unless it becomes an absolute necessity. If there are no objections, especially from @Mathfuric or @quilltid, I want to move on with the whole party able to consider the encounter (i.e. thru the poll or dialogue).