For me, it's actually one of the most interesting battles (alongside the one with the lava) because you fight in extremely tight spaces with cliffs, and the usual height advantages are not present. In one playthrough with the main character, I won the initiative, climbed aboard the duergar's ship, used Repulsor, and the battle ended immediately.
In general, shoving is a useful mechanic to counter ranged characters who would otherwise have too much advantage from heights (since there are no abilities like Teleportation in DOS2 in BG3).
