Juggs do not get more health in Rage spec, they are far squishier than most as they forfeit extra DCDs in the tanking tree and more endurance on gear. Honestly, sins are a counter to mara and jugg. They are one of the best 1v1 classes in the game and you have plenty of tools (insert CC here) to beat either Rage class (which are the worst 1v1 specs for both ACs).
I could ask the question of why you are trying to kite on a sin? I don't have experience with this particular class, but as a majority of your abilities are within melee range, it seems silly to gain distance.
Forgot to mention, when running madness spec, it's not best to sit there, you have to kite.