That's a leader, not a Leader combat role. Any character class could do those things you describe.No, she was the leader of the half of the companions that found the Dragon Orb in Icewall and killed Feal-Thas. She was the one who used the silver dragons' ice breath weapon to dam the Vingaard River and then use brass dragons to release it to flood the Vingaard Plains. It was Laurana who summoned up the will to control another Dragon Orb in the High Clerist's tower, something she was able to do because of her high mental stats.