>>718871150
You're a fucking moron. The game is calibrated so that you want to use the shield, parry and lightning step all in different situations.
Lightning step has low risk, but not as much payoff. Repeated use without proper timing will fuck you.
Parry has high risk and high payoff, but for a lot of attacks (especially late game) the timing windows are just too damn narrow for it and you get obliterated if you miss.
Shield has low risk and rewards using it more with the shield bash doing a fuckton of damage; it's a good option for when parry is too risky and lighting step is also too costly. The downside is you still eat damage, so it requires more careful health management.