You really should have mentioned that the 3rd boss is a DPS race against the clock. If you don't have an ifrit weapon or your level 50 HQ crafted weapon it's going to be a rough encounter. Have a range deal with the adds makes the fight easier, but it's just a hard dps check.

The 2nd boss is by far the most difficult imo. The debuffs, the AOE, that stupid fire spell he does. All of it is basic on the mechanics side, but it's still rough for undergeared people. Get some basic level 48-49 gear and then run it. Makes the dungeon easier for everyone.