Recent quests seem to feature enemies that all share a trait. I think the developers are trying to make cards like Rossiel shine in a lot of different scenarios. Now we have Azain Silverbeard, who also works best against these sorts of encounters.
This one worked pretty well against Flight of the Stormcaller, since the enemies share a trait with the ships!
http://ringsdb.com/decklist/view/1373/azainy-dwarf-deck-2.0
Edited by Seastan