What if "requiring" certain DPS numbers is missing something in trials?? For those players who have not defeated Molag Bal, yet; STOP READING.... SPOILER ALERT...
Just as in the final battle in the Molag Bal fight, a special mechanic (i.e. a specific weapon...) was required to defeat him... although it was possible to "burn him down" (yet considerably more time-consuming...) with conventional weapons; isn't it just as possible that there is a similar mechanic (obviously not a specific weapon..) that can more effectively defeat trial bosses??