Resources on Ephesians
Proclamation Trust has an entire cache of good sermons on Ephesians.
The Doctrines of Grace, by Sinclair Ferguson. The Holiness of God: 2009 National Conference. Ligonier Ministries. video lecures 
David Searle, "Ephesians 6:12 The True Nature of the Believer's Conflict," Evangel (Spring 1996): 4-7.
David Searle, "Ephesians 6:12 Struggling Against the Rulers, Against the Authorities," Evangel (Autumn 1996): 68-71.
David Searle, "Ephesians 6:12 The Powers of Darkness," Evangel (Spring 1997): 2-6. 
Gary V. Smith, "Paul's Use of Psalm 68:18 in Ephesians 4:8," Journal of the Evangelical Theological Society ####:181-189.
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