This is an old thread and I had not noticed it in the right time to give an answer.
The Armenian Church Fathers DO teach about a post-mortem "struggle" which is somewhat the same as the teaching of "tall houses" of the Eastern Orthodox Church, though without such stories like that of Theodora which is perhaps an apocriphal story. The Armenian Funeral rites (the unabridged old versions, found in 1905 edition of Mashtots, the official Book of Rites of the Armenian Church), ask to help the departed soul pass through the demonic attacks peacefully, by the help of the accompanying good angel. This teaching can be found in the writings of many Armenian Fathers. Even the songs and the famous prayer of St Nerses the Grace-filled (that which has 24 chapters) mention this, and these songs and prayer are part of our official Book of Common Prayers (the Book of Hours, Zhamagirk).
Just pay attention on the 20th chapter of the above-mentioned prayer of St Nerses:
20. Bounteous Lord,
commit me to a good angel,
who may deliver up my soul with sweetness,
and convey it undisturbed through
the malice of wicked spirits
who are under the heaven.
Have mercy on Your creatures and on me,
a grievous sinner.
St Gregory of Tathev even brings an apocriphal story about the Holy Mother of God Mary who before her dormition or passing away tells those virgins that surrounded her what happens to the soul when it is to depart from this world. How angels come to take the soul, how it passes through the demonic attacks etc.
Nerses of Lambron writes on this topic amply in his Commentary on the Story of Dormition of St John the Evangelist.
Vardan of Aygek writes on this topic too, Sargis Shnorhali, Arakel of Syunik etc.
One must note that the apocriphal story of the Dormition of St John the Evangelist was part of the Armenian Bible for many centuries. And in that story there is a prayer by St John in which he asks the Lord to send the attacking demons away during his departure from this world. St John prays:
"Now, O Lord, when I have accomplished Thy stewardship with which I was entrusted, make me worthy of Thy repose, having wrought that which is perfect in Thee, which is ineffable salvation. And as I go to Thee, let the fire withdraw, let darkness be overcome, let the furnace be slackened, let Gehenna be extinguished, let the angels follow, let the demons be afraid let the princes be broken in pieces, let the powers of darkness fall, let the places on the right hand stand firm, let those on the left abide not, let the devil be muzzled, let Satan be laughed to scorn, let his madness be tamed, let his wrath be broken, let his children be trodden under foot, and let all his root he uprooted; and grant to me to accomplish the journey to Thee, not insulted, not despitefully treated, and to receive what Thou hast promised to those that live in purity, and that have loved a holy life."
It is this prayer that is explained in details by Nerses of Lambron in his above-mentioned Commentary.
In a song for the departed ("Astuats anegh"), found in the Night Service of our official Book of Common Prayers and authored by St Nerses the Grace-filled, there are such words:
Let the princes of the air be shattered,
Let them not be a hindrance to this soul,
Give rest to our reposed
In the mansions of Your Father of Light.