After what seemed like a fort night of eager anticipation, I received my "assault on osgiliath" adventure pack today in the mail and played the scenario several times both solo and with a local friend.
In general speaking about the quest it seems like a relatively fair scenario. By that i mean, there arent any cards that are going to end the game the second they show up (like a sleeping sentry or the much discussed watcher in the wood). There are however many powerful and brutal cards. The Southran Commander is practically a stronger Haradrim Elite and the Uruk Lieutenant can be especially painfully especially if he pulls out a bulky enemy like the orc vanguard. The treacheries are actually quite mild except for Pinned Down which can be just a killer if there are any other archery enemies in play. The quest does seem to increase in difficulty with the number of players as there is a much greater likelihood revealing more osgliliath locations during staging if you are with 2 or 3 people thus prolonging the game.
This quest is uncommon in that the longer the game goes the tougher it becomes where as most scenarios if you can make it thru the first few turns and set up; you'll generally be just fine. With assault on osgiliath, you need to be lucky enough to win within the first 2-3 turns or you're going to be in for a long battle.
For my 5 solo attempts i used a different deck each time. Mono-lore, Lore/Tactics, Lore/Spirit, Mono-leadership/outlands and Mono-tactics. (each lore variation used Faramir and the various ranger cards). My first attempt with mono-lore lasted forever as i kept staging into osgiliath locations, there was a few times i thought i was just about finished, but eventually won. I conveniently pulled out all 3 ranger spikes quite early which was a nice boost for faramir. Lore/tactics and outlands lost quickly as i couldnt get enough will power fast enough and quickly became bogged down with enemies and locations before i could get things set up. On my Lore/spirit and Mono-tactics i was able to achieve quick victories as i lucked out by only revealing 1 additional osgiliath location after the initial set up.
I played 3 2-player matches with my friend who was using a glorfindel-elrohir-elladan deck. I used the outlands, mono-tactics, and spirit/lore. The outlands attempt went relatively smoothly and we recorded a respectable score. The Spirit/lore attempt took forever as it seemed the locations would never stop flowing. On top of that there was an almost endless amount of archery damage being dealt. At one point we had 3 southran mercenaries and an orc arblaster in the staging area. Combine those with the pinned down treachery and we had all our characters 1 hp away from death. Eventually won but it took forever. I used mono-tactics for our final 2 player attempt. It did not end well. on like turn 2 we staged into an uruk lieutenant who pulled out the orc vanguard and southran support which pretty much overwhelmed and killed us
that was way too much typing but id love to hear you're experiences too as it seems like this is a quest that will mostly turn out differently for each player