One of a pair of decks used to beat Tower of Cirith Ungol in Saga without outright breaking the theme. (we managed it on the 2nd try by the skin of our teeth)
All heroes are FFG created and no other card in unique, so one can make the case that this unlikely trio was working behind the scenes, helping Sam clear the tower.
The strategy is as follows: Gather Information for Gondorian Spearman or Spear of the Citadel. Both players will probably need to take the whole 5 threat from The Two Watchers (the low starting threat really helps here), so that you are able to kill it turn one. After that, 3/4 of enemies you can reveal have 3 HP or lower, which means you can pretty realiably set up Gondorian Spearman to kill them after they get the damage from Thalin and Argalad with occasional help from the encounter deck.
Even then the quest is far from done. You should rush to get a solid defender (Sam Gamgee) ready and take out the two Nazgul Burden enemies as soon as possible (to make use of Sam's ability). Once you do, you should be in the driver's seat, be careful with your threat though.
The deck could probably do with some more healing (the two Warden of Healings being too little in our games, so make use of the sideboard - switch with Hail of Stones or Pursuing the Enemy.