After fighting the Hill Gigas, this floor should seem relatively tame in comparison. The encounters are more of the same, though the same group that was guarding the Sleep Blade can be found here as a rare encounter.
The floor layout is an interesting maze. Instead of walls, your obstacles are stationary guards. Even if you engage and kill them, they won't disappear, so just avoid them. You'll have to take a roundabout path to the central room where you'll find the Dreadnought's engine. Head first to the northwest corner, then the southwest, southeast, and northeast, before finally heading to the interior in the middle of the northern path. At least there's no boss fight waiting for you!
The floor layout is an interesting maze. Instead of walls, your obstacles are stationary guards. Even if you engage and kill them, they won't disappear, so just avoid them. You'll have to take a roundabout path to the central room where you'll find the Dreadnought's engine. Head first to the northwest corner, then the southwest, southeast, and northeast, before finally heading to the interior in the middle of the northern path. At least there's no boss fight waiting for you!