Using Palantir to inform your trap plays works surprisingly well.

Palantir Trap

Main Deck

Hero (3)

Damrod (The Land of Shadow)

Denethor (Flight of the Stormcaller)

Eleanor (Core Set)

Ally (23)

1x Anborn (The Blood of Gondor)

3x Envoy of Pelargir (Heirs of Númenor)

3x Erebor Hammersmith (Core Set)

1x Faramir (Core Set)

3x Gandalf (Core Set)

1x Ingold (The Wastes of Eriador)

3x Minas Tirith Lampwright (Encounter at Amon Dîn)

3x Pelargir Ship Captain (The Morgul Vale)

3x Veteran of Osgiliath (Escape from Mount Gram)

2x Warden of Healing (The Long Dark)

Attachment (20)

2x Ambush (The Land of Shadow)

2x Forest Snare (Core Set)

2x Heir of Mardil (Celebrimbor's Secret)

1x Mariner's Compass (The Grey Havens)

3x Palantir (Assault on Osgiliath)

3x Ranger Spikes (Heirs of Númenor)

3x Steward of Gondor (Core Set)

2x Unexpected Courage (Core Set)

1x Visionary Leadership (The Morgul Vale)

1x Wingfoot (The Nîn-in-Eilph)

Event (6)

3x Legacy of Númenor (The Voice of Isengard)

3x Sneak Attack (Core Set)

Player Side Quest (1)

1x Gather Information (The Lost Realm)

3 Heroes, 50 Cards

Cards up to Flight of the Stormcaller

Deck built on RingsDB .