A few things that my group had done in Turn 7 (this is from my perspective as an OT):
- The combo I used to grab the bladedancers quickly without the DPS pulling (our MNK hits really hard really fast lol) is a Tomahawk -> Flash -> Butcher's Block. That should give you enough time to finish a BB combo before anyone pulls.
- If your group is having trouble with killing the blade dancer (especially the second one) before the next one spawns, you can have your MT provoke the blade dancer to hold it while you go grab the next one. The third blade dancer spawns quite far from the second one, so this little window of time really helps and keeps the people in the middle from getting tail slapped. Remember that the third blade dancer doesn't have to go down as fast because there will be no adds until Melusine reaches 60%.
- Feel free to blow a CD for each of the blade dancers. Their tail slap hits extra hard and it makes the healers life easier since they're probably focusing on the ranged getting hit by fireballs and the MT.
- If you're a Warrior OT, switching in and out of Defiance speeds up DPS on the next set of adds (the archers after the bladedancers.) The archers don't have an aggro table, so the extra DPS gets them down faster. It also helps in between phases where you're all basically focused on Melusine. There is a lot of downtime in between adds (80% and 35% are the only ones you have to tank) so start pumping out that DPS!
- Remember to check your positioning, you don't want to get shrieked. Also, if you have the voice, Flash is extra useful. It doesn't turn you around and you can avoid petrifying your team or even giving an add or Melusine a stack. They really start hitting hard after they've gained some.
- Place the last add in a spot where everyone can turn around when she casts Petrifaction. We positioned her next to the boss because everyone is staring at the boss already. (From what I know as well, the boss doesn't have an enrage or it takes a while for her to, so LBing this add is a good decision imo. After that add, you just have to continue to petrify the Renauds and avoid voice and the fight is done!)
And a tip for the MT:
- Remember to always position yourself to be behind a petrified Renaud. If you're not doing that, then you probably won't progress. The Renaud might not always be where your team planned it to be, so be prepared.
- Don't be afraid to move around, I think only two of her moves cleave and one of them is a circle AOE called Circle Blade.
Good luck on T7! It's my favorite so far.