The Corrupted Empress

Some more info from Spadow. It looks like the personality system won't help at all with survival against the Empress. If it does, it certainly will take a long time to get it up to level.

 Credits to Spadow

Level 6 Will: +100 HP, +5 physical defense, +5 magic defense.
Level 18 Craft: 3% chance of doubling the efficiency of a skill, +1.5% scroll success rate.
Level 13 Charm: Nothing.
Level 18 Charisma: Ignore 1.5% of the target's defenses, +3 PvP Damage, 9.3% EXP loss upon death.
Level 0 Sense: +0 MP, +0.0% quest EXP.
Level 17 Insight: +25 accuracy, +25 avoid.

The Empress was also nerfed a bit. 25500 > 20400 attack, 35500 > 28400 magic.

I think that a party with a Paladin, an Aran, a Mechanic, and a DrK can tank this now.., too lazy to do numbers though. You got threaten, power guard, achilles, and combo barrier to reduce that 20.4k physical damage to 7.5k or lower(Healing robots will heal 7.5kdmg every 2 seconds to a Paladin with 30k hp, and if that's not enough the Paladin can heal himself). I'm pretty sure all those skills will be enough to lower that damage to something very low. Combo barrier is the only party skill there, and it can be used because Arans got Combo recharge after a balance patch in KMS, which adds 150 combos. 50 extra combos is not hard to get. The other members of the expedition can go hug the wall, while the Paladin rushes the Empress during pot cd. Hopefully, Dark Genesis won't hit the whole map....and kill them all.. The other problem should be damage reflect, but most bosses don't active this kind of skill till like 10% hp left.
Edit: Mechanic's healing robot heals 50% HP after the balance patch mentioned above, even better than I thought. 15k hp for a 30k hp Paladin.