Errr.... Prime is on a convincingly higher level of power from what I know. On most sites (battledome, cbr, KMC), Darsh is considered Skyfather level which Prime and Monarch dwarf to insane extents. It's kinda tough to visualize what either party would do to each other, but there's really no way Darsh is harming a being like Prime, given that he survived a universe-busting attack before becoming the Time Trapper.
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"Give him a fair trial. Then shoot him." - Napoleon Bonaparte after the capture of Andreas Hofer