Sounds like you are winging it in your theology! Making it up as you go along is the philosophy of fools. When you stray beyond what the Bible actually says and make it mean something else, you are on dangerous ground!

The four beasts in Revelation are angels - nothing more - that picture the Lord Jesus Christ as He is presented in the four Gospels (the same picture the fourfold faces of the cherubim give). The seven year tribulation was fulfilled in six hours on the cross - if you were one of my clients at the Gospel Mission, I would ask you how much crack you were smoking...