I second this, some of them are straight up EVIL. Their basically abyssea NM's without the crour buffs / mega atma's, no Apoc / RR / GH silliness. Our shell has one O.Chain PLD and one Aegis PLD, both have Almaces and they get tore up, but at least their alive. Melee's tend to die in seconds after pulling hate, this isn't an exaggeration some of those NM's have PT moves that deal 1~1.5K, outside of abyssea. Windy T4 Iron Giant use's Arm Cannon, it was a 20 foot range on target, which is usually your healer. Problem is "cure" max casting range is 20 (you can get away with 20.8), so your healers can and will be one shoted quite frequently. Sandy T4 VWNM will put your tanks into a weakened state, and there is absolutely nothing you can do about it. They gotta learn to tank with half the HP and long timers / ect. Bastok T4 is about the tamest of the bunch, but she's got evil aoe moves that will take away all your MP and deal heavy damage. One of her moves is aoe encumberment (locks all gear). T3 Sandy VWNM likes to do a move that dispell's all your buffs aoe, then immediately follow it with another move that strips all your gear and locks everything out for 30~60s, and then cast Fast Cast Blizzaja or Thundaja onto your tanks.
Anyhow the days of (MNK + WHM beats EVERYTHING!!) is over once you step outside Abyssea. Counterstance tanking doesn't work so well on VWNMs.