All plated armor does is protect you against slashes, and thrusts to some degree. What alot of people don't realize is that someone encased in such a suit of armor still recieves significant concussion damage from heavy blows, and if he can be knocked to the ground an enemy can easily find an unarmored piece of flesh to stab, for instance. And in close, congested melee, being knocked down or thrown off balance and falling is one of your greatest concerns.
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