[@13org]

I suppose either way it's useful; I kind of see the heavy-armored character being like a vanguard with a grenade launcher that potentially has elemental-explosive rounds (Though all-hit might be OP, so this isn't advice just a thought) 

It probably comes down to what you would think of as most interesting: A character that can stay back, dish damage, and stay alive through an encounter... Or a individual that still dishes damage, but builds aggro and tanks for the small-fry with a boomstick. 

I won't pass up on the opportunity for there to be more people soaking up heavy hits so Jenga doesn't have to: I was looking at a bit of difference in roles. But the concept is different enough that it still works if that's what you decide to go with.