I honestly don't know if DRG would work or not, but there is one detail on time gates I haven't found in English so might as well share it: the time gate enrage is based on the "Temporal reconfiguration" progress bar, you wipe if it gets to 100 (it's under "Duty Information"; you probably have never paid attention to it before unless it determines how hard a boss' 2hr hits, like in Extreme Leviathan or Thordan's Reign).

As best the JP blog I copied this from I can tell, it starts when someone touches a mob (or presumably if you wait too long, automatically) and from then ~1-2 points per second per live enemy with a human target or ~4-5 points if no human target. So there is actually such a thing as trying to start too soon on those if we're talking Solid State Drive Man vs. Ms. gotta-have-my-dots. The difference may buy you a few seconds.