1: Force attacks are mitigated by armor.
2: Bleeds from the anni tree are force attacks (at least pre 1.2, I am not sure if it is the same after 1.2) meaning they gain crit from the Malice talent, but they deal internal damage, which ignores armor.
3: Force scream is mitigated by armor, and will do a lot more damage if you have gore on. You can check it yourself