Sidious power growth over time

Is there any evidence to support Sidious' power growth over time? Specifically between ROTS and ROTJ, and between ROTJ and TROS

well RTOJ to ROS is apparent because he wasn't a fleet killer previously

ROTS to ROTJ is a bit more difficult to pin down but I believe there's some allusions to it in the novels and comics; don't ask me specifics but its out there

Originally posted by relentless1
well RTOJ to ROS is apparent because he wasn't a fleet killer previously

ROTS to ROTJ is a bit more difficult to pin down but I believe there's some allusions to it in the novels and comics; don't ask me specifics but its out there

Was him calling on the power of all the sith implied to be a new power? The novelization states that he called on the power of all the sith when he draws Kylo and Rey's power from them. I'm just trying to figure out if he's always had that power, if it's because he holds the spirits of all the sith, or if it's because he is on Exegol (a possible dark side nexus)

Found this in the novel:
"Kill me and my spirit will pass into you. As all the Sith live in me. You will be empress. We will be one."
So that answers that. Sidious is literally all the sith.

I don't think there are any statements in canon which explicitly state that Palpatine's power had grown in the time between RotS and RotJ... But given the fact that he had an abundance of knowledge that he was hoarding/studying over this time, we can logically infer that RotJ Palpatine > RotS Palpatine.