The Guardian Path focuses on improving a Knight's Defensive potential. All of their Ability modified Skills expect (and sometimes require) a one handed physical weapon and a physical shield. Several ability modified skills increase Hate as well, giving this Path the highest tanking potential in the game.
Intently: Iron Will - improved Duration.
Desperate Resolution: Invigorate - improved Duration.
Power Steel: Solid Defense - improved Cooldown.
Iron Shield: Wall of Holy Light - improved Damage Absorption.
Technique of False Gods: Solid Defense - improved Damage Absorption.