The Dry bones prophecy is explained in the text itself. It does not have anything to do with individual salvation. The dry bones are the Whole House of Israel. It has nothing to do with the Church, it has nothing to do with individual salvation. It speaks of the return of the Jews to the land of Israel. God did not say that the dry bones are the unregenerate elect. He did not refer to the house of Israel as the individual gentile. The dry bones are referred to in the text as the scattered remnant of Israel.
Any standard book on hermenutics will tell you that when the passage is explained literally, then you cannot say that it is allegorical. It may have a secondary meaning, but it certainly can't be used to prove regeneration before belief. That is nowhere to be found there.
If that is the best grace_preceeds_faith has, then he's got nothing.
It's pretty obvious he's not hearing us.