Originally posted by Galan007
Vader was trying to defend against Palpatine's lightning initially(Palpatine even commented on it):
https://i.ibb.co/Dt83hy3/Star-Wars-Darth-Vader-2020-006-002.jpg
It's just that Palpatine's lightning has evidently evolved to the point where it can no longer be blocked with a lightsaber.But after Vader's saber was stripped from him, there was really nothing he could do but get raped.
He did defend instinctly of course, but still Vader just didn't try or had intention of fighting back. He just didn't. Palpatine should win in any case, but what happened in this issue just wasn't that relevant. Vader just wasn't trying.
And it seems Vader suits just makes him vulnerable to lighting, that is still the case with his suit.
When Vader comes with full intention and determination to put Palpatine down, that will be serious. Problem with Vader was that he never found a real reason to rebel, it was like he never cared... when Luke came he was also constantly fighting within himself.
And the whole point of issue is that Vader is somehow losing it and Palpatine wants to bring him back to embrace dark side fully and to return him to his form or even stronger. Vader head was confused to the core and Palpatine knew it.
It was always somehow in the air that Palpatine was stronger than Vader, but Vader had far greater depth in power and connection to the force, which was never fully embraced. That was always in the air.
So i think we won't see Vader threating Palpatine power wise.