I'm not sure if anyone else is having issues with this exotic after the rework but it will not create the dual combination rifts on solar weapon kills when rift energy is full (or at all for that matter). It should be noted that rifts on Dawnblade kills does work. Getting rift energy while getting solar weapon kills in a rift also works (although it will sometimes only award energy on alternating kills). While testing Promethium Spurs with a friend we managed to only create a combination rift once and that was while standing in an ally Warlock's rift while using Chrysura Melo on a shank. Additional info for this includes that my Chrysura has dragonfly and heating up and testing was done on all Dawnblade subclasses but only resulted in the single successful combination rift on bottom-tree.