I think it is you who needs to gain some basic knowledge of game mechanics.
interestingly, light armor is EXACTLY the same effectiveness as heavy armor vs. force attacks, because armor does not mitigate force.
There's no such thing as "force attack", there are 5 different damage types in the game; kinetic, energy, internal, elemental and weapon damage. Force attack is only used to describe kinetic or energy damage made by force using classes. And kinetic and energy damage is mitigated by armor thus is "force attacks" mitigated by armor.
Edit: and also, if that is your character on that askmrrobot page, your whole build is a fail.