I've got a couple of warriors between level 36 and 45, they're in chain right now, have around 25% redux and they too take maneuver hits and keep on going, I've yet to have one that outright has killed them.
None of my squares have crit padding on their armor.
Hell, even my level 28 TWC paladin that wears unpadded chain mail survives maneuvers.
I've got multiple pures that range from low level to capped and even with 15+ CER crit padding with soft leather, low endrolls (low endrolls of 102 can kill) from maneuvers either outright kill or at the very minimum put my pures running back to town to heal so they can go back to hunt. The only exception to this is my level 61 reduxmage, he's got almost 16% redux, wearing studded leather and has 7 CER crit padding - he can take a hit almost as well as my rogue and keep on hunting most of the time without having to retreat.