the following is a PM i got from my post in a topic on the quests and missions board regardsing CoP missions (the part in quotes thats horribly typoed is my post and obviously the one that isnt in quotes is the reply):
"do you EALLY need rngs or nins to do ALL the CoP missions after all thats the way ot seems.... chapter 1 was tolerable since lvl nin or any job for that matter to 15 is quick and any GOOD melee has war lvled to 37 for a sub and chapter 1 is 30 capped so thats no problem.... but Im sure not everyone wants to lvl nin or rng (as expensive as they are) to high lvla just to get a misison done and playing a mage is just boring... for me anyway.... so is it possible for a sam or thf to do teh missions after chapter one of should SE start putting on the covers of CoP boxes "Newest expansion of the FFXI series for Rangers, Ninjas and Mages only all other jobs need not apply"?"
No you don't. I'm up to the Diabolos fight, and I'm a PLD! The reason people take NIN to a lot of these is they are cheap and dont wanna get medicine. When you have NIN tank, you dont get hit as much which allows for the normal flow of MP to suffice in healing. These BCs are much more challenging than anything SE has made so far, but that's not to say they cannot be won without RNG or NIN. If you look on this thread, there is some guy who makes videos of these BCs. His pt has NEITHER a RNG nor a NIN! So dont' let everyone convince you that it's RNG NIN onry... they just being lazy and want the easy way out.