This quest is so hard because it has an even spread of 12 enemies, locations, and treacheries. With that in mind I understand this will be a low win% but I'm trying for at least 1 in 3.
Best I can come up with playing 2 players is an Aragorn, Mablung, Hama monosphere engage and lock deck and a monosphere low threat lore deck to draw cards and pray for a first turn forest snare or lots of chump blockers.
I find this to be by far the hardest of the three lost realm quests but others say Weather Hills which I figured out quickly. Are my draws unlucky? I feel like there really is no secret for how brutal this quest is. Just gotta get lucky