But shouldn't his natural 1 roll make his armor be useless? That is, he failed to avoid my spear and/or revealed a sliding spot for his armor, thus allowing me to slip in. It effectively acts as a "Psuedo-Crit" for me? I gain no bonuses, but he loses his bonuses X3

Your choice :P so I'd do 6 damage total + poison. Or just effectively add poison which, would have been done if he rolled anything at all due to he 36 <_>