Super Sapper Charge

Yes. Cloak of Shadows resists it.

Actually, that's incorrect, it won't deal less damage to a Warrior. Armor decreases damage taken from physical damage but the charge deals fire damage, which isn't affected by armor.

i don't see why not since warlocks can avoid durability through hellfire suicide and shadowpriests can do the same through shadow word death. although it struck me that the mats required to make one would cost much more than the repair costs of one durability hit.