Your theory hinges on “The Emperor is sooo powerful/evil that he…” which is lamer than shit.
He’s so powerful/evil that he can use force lightning. How is that lamer than shit?
Darth Vader is a top tier Force Wielder.
Nothing in the OT indicates this.
He says to Obi-Wan (who is a Jedi Master) he was but the learer but now he is the master and he can Force choke someone with thousands if not millions of miles of space separating them. I need not say more.
To say that he can’t use Force Lightning because he’s somehow inept in comparison to Sidious is to claim Sidious is akin to a God which is lame.
Except I said neither of those things.
Less powerful /= inept
I said you said he was inept in comparison to Vader which is literally what you said when you suggested that he wasn’t as strong to the point that Sidious can do something Vader couldn’t even attempt.
More powerful /= God
I should have said demi-God.