There is a difference between killing bosses in Coil compared to dungeons im sorry to say
Well I'm sorry to say that I don't see the difference. To me it's just the same thing.

Going into Coil even knowing all the mechanics for each boss, you're still going to wipe a bunch before you get it down on farm. they're not comparable
Really? Not comparable at all? Okay so, I go into coil, knowing all the mechanics, I can execute the dungeon properly without mistake, but then I depend on my entire team. So this one guy isn't as used to the mechanics as everyone else and we all wipe because we don't meet the DPS requirement...that sounds oddly familiar as anything else in this game, even if the other stuff is easier. What you are saying is the difficulty of execution is different, but once mastered, it really isn't. Press buttons, dodge abilities, execute mechanics. MMO in a nutshell.