so 250 hp +BA + 2 toughness + 2psycho + buffed out AC = unkillable
The way I imagine Armor Class is more or less like armors "permeability". Better AC = stronger and more resistant armor that can take larger impact. Honestly how could kevlar suit help me not to get shot? It reduces damage from projectile impact but it does not affect if enemy hits me or not. So imho AC should more or less affect final dmg taken rather than chance to hit.