I’d really like to see a Nightsister green smoke effect (with SFX included) either around Sidious’s life-support system or when he drains the Dyad power out of Ben and Rey.
Yeah the red lightning might feel like something coming from a videogame or a comic book, but I’m still intrigued by its plausibility. At least it has a precedent in the form of the Son of Mortis, and besides, the Dyad power did not only restore Palps but also gave him brand new clothing so I think most audiences could give it a pass.
Also the visual contrast between Palps’ red lightning and Rey’s blue Skywalker lightsaber would be impressive.