I. Floors:

The increased difficulty simply comes from higher stats, so there's no need to change your strategy. You still face a single boss, and all you have to do is eliminate it.

Boss Skills:

Heavy Grinder: Deals 100% damage to 1 enemy (The boss' basic attack).

Imprisonment: The boss' main crowd control. It imprisons 1 enemy for 2 rounds. Try to avoid getting your main damage dealer or healer affected by this skill, or you might have a hard time completing the requirements.

Black Hole: The boss' AoE skill. It will grant an extra move if it kills an enemy. To counter this skill, you need to watch all your Saints' HP closely. You'd be at a  disadvantage if the boss receives additional moves.

Oblivion: The boss summons Saints and receives skill buffs at certain HP levels. You should try to focus down the boss as soon as possible, since it becomes  dangerous when it transforms.

II. Strategy:

This floor requires you to kill the boss within a certain number of rounds. This requires a main damage dealer as your carry and it should be at as high a level as possible. Victory Conditions:

Have more than 40% total HP remaining. This makes Eagle Marin a must-have. Additionally, the levels of your main damage dealer and healer should be higher than that of other Saints, as this makes it much easier to complete the instance. The 5-round limit requires your main damage dealer to be able to deal significant damage.

III. Recommended Level:

It's recommended to use Saints of at least level 35. They need to have enough HP to ensure that you do not end up with less total HP% than required, so that you can clear the floor. We also suggest that your main damage dealer be of a higher level than the rest of your Saints to ensure that you can kill the boss within 5 rounds.