Just got my Juggernaut to 20 yesterday.
Equip a reconstruction ring to level - you won't lose anything important, trust me.
Wear a resistance item, carry haste pots (stacks with armor of speed, at least for the save bonus), and have a dex + cha item for tough traps - I was able to do the Crucible swim on hard with rolling a 2 = save. The saves are fine - it's just that gearing for them is tough while leveling (I didn't use water stance, btw - I took mithril plating at level 1, until I realized at 20 that my feat order was screwed up due to manyshot not being an arty bonus feat, which cost me about 8 feat exchanges worth of astral shards >_<).
Maximize definitely helps in heroic levels, though...but even still, my self-healing felt a little weak until 19. Luckily, this build is so powerful it just annihilates many enemies before they do much damage (but elite RwtD was a much larger challenge than normal - had too much trouble soloing, so wound up having to get a group for it, which completely steam-rolled it).
Currently farming my Spare Hand and Ring of the Master Artifice ingredients that require me to be no more than level 20 for maximum efficiency, so can't say too much for after that, but getting to 20 was about the easiest I've had it leveling a melee (with the exception of RwtD - my FvS crushed that, while this character suffered more).