Fwiw, it is my understanding that what we specifically reject is "salvation by human
works". When our works are done together with God (synergy), on the other hand, they are indeed effectual for attaining salvation. Even Paul told us to "work out our salvation" and spoke of being "fellow-labourers with God," after all. I would definately agree that, in the end, it's all about grace, as every good thing comes from God. Regarding the "how" of salvation, I think His Grace, Bp. Kallistos put it well:
"...the Orthodox Church has never formally endorsed any particular theory of atonement. The Greek Fathers, following the New Testament, employ a rich variety of images to descibe what the Savior had done for us. These models are not mutually exclusive; on the contrary, each needs to be balanced by the others. Five models stand out in particular: teacher, sacrifice, ransom, victory, and participation." (How Are We Saved?, pp. 48-49)
The error of some of our Christian friends, then, would seem to be not in speaking of faith or ransom as being key to salvation, but to speak of these things to the detriment
of the other parts of how we are salved. The resurrection means nothing without the cross, which means nothing without us participating in the Life in Christ, which means nothing without the blood of Christ covering our sins, and so forth. It's all inter-related. I would definately second ICXN's recommendation of that work by St. Mark the Monk. Fwiw, I've also found the writings of St. John Cassian (which are available online at CCEL
) and St. Nicholas Cabasilas to be helpful on the matters of faith, works, and grace.