Here is a rundown of each Lost Ark server from MeadeDorian's blog

In the second half of the Grey Hammer map, just following the minecart ride you'll encounter the Elite Grayhammer Mugger in the next set of enemies to fight. He's located in the north corner Lost Ark Gold, alongside an additional subbosse.

Head south starting from Lakebar Village down to the Raid Group Camp. Once you're there, go west as soon as you are able, and then into the first camp that is located on the north across from the weapons rack. In the middle is The Elite Raid Group's Supplier.

Follow the southwest route that leads to Freyad Lake Triport in Medrick Monastery. In the zone populated by bandits, your Boss Red Poisonous Lung should be visible. However, its spawning rate could fluctuate, so you may want to switch instances using the switch in the top-right corner of your screen.

Raging Darkness Cragolith Monster Location

You may see a naming error here, and you'll discover a 'Crazed Darkness Cragolith' - but it'll provide you with the necessary tick to complete the West Luterra Adventurer's Tome for the "Raging Darkness Cragolith' monster. Begin by walking from the Medrick Monastery Triport towards the Lakebar portal. The path opens into an area with a tree that is situated in its middle. On the other side, to the west of the tree is the Darkness Cragolith you need.

Raging Elemental Monster Location

Then, from The Medrick Monastery Triport, head to the southwest for as far as you're willing to go. The route turns northwest, and then northeast. Do not take the northwest turn, and continue heading northeast to the dead-end. When you reach the fork cheap Lost Ark Gold, turn right - and you'll find The Raging Elemental in a group of foes here.