It also depends if you are asking about 9 boss with a PLD or 8 boss with a 2nd DD. SAM can solo E in what really feels like no less time than everyone assaulting it can. WAR can down it pretty easy with RR>RR>UH>UH too, even with the damage reduction from using the same ws twice in a row. DNC doesn't even need to melee E in an 8 boss, technically.
If you're a static you could just stand aside or do shark bite without any major problems until you get stage 3.