You had that little mixed up ...
Halsin didnt run, he went to investigate ...
His Groove was not under attack, until Aradin and his group lead Goblin scouts to its gates ...
Refugees was no problem in his point of view, when we leaved ...
He didnt go after some artefact, Aradin did ... Halsin went with him, bcs he needed to find entrance to Underdark, where he would look for entrance to Moonrise Towers ... for one bcs of tadpoles, and for two bcs of shadow curse.