Regarding salvation and the relationship between faith, works and salvation, I think you have to sort out the former before you get to the latter.
For us, salvation is not merely declaratory. Rather, God declares us righteous, and then makes us to be righteous. So salvation for us includes both what you would call justification and what you would call sanctification. Lutherans, frequently in my experience, discuss salvation as being equivalent to justification. Similarly, salvation for us is not just God looking upon us with undeserved favor, but also includes actual union with God, participation in His life through the Sacraments, etc. There is an idea of this in Lutheranism as well, but in my experience it is sometimes downplayed. Finally, for us, salvation is not merely a past event, but includes past (I was saved), present (I am being saved) and future (I hope to be saved). Not just I AM saved, but all of those different tenses at play.
Putting faith and works over this backdrop, one might say that faith is the means by which we receive salvation, and works are how salvation is lived out. Neither faith nor works earns salvation. Credit or merit is downplayed in Orthodox soteriology. There is a notion of it -- before communion we pray, for example, "make me worthy to partake of Thine Immaculate Mysteries unto remission of my sins and unto life everlasting." But we aren't talking so much about our works OR our faith meriting anything toward salvation. They are "necessary" in the sense that one cannot be saved without them. But neither is one saved because of them. Someone on this board once wrote "you are not saved because of your good works, but you won't be saved without them, either." I think that's pretty close to the mark. I also think, once you cut through all the morass, it's not really very far off at all from how Lutherans view salvation. There are differences in approach, but we end up very close to the same place.