First I want to point out that this will NOT be an end-game character. It's a whacky idea for a monk-spashed ranger to get through a barb life as painlessly as possible. The toon would TR again immediately as soon as it gets to 20.
So could a Barb 12/Ranger 6/Rogue 2 Helf take the Monk dilly and get enough AC to work through the first 19 levels of the game?