Which doesn't account for Nihilus pulling numerous ships out of an incredibly intense gravity well. As opposed to pulling one ship towards the surface.
Galen's ISD feat takes place just before the Death Star. Nihilus' feat takes place prior to draining numerous planets of their Force energy. There's no comparison at all there.
@killbilly: It takes place prior to Vader capturing the Rebel leaders and the commencement of the Death Star finale. Any growth he had between those would be marginal in comparison to Nihilus draining planets.
SithRevenant's comments