This fight begins with 3 nameds, Quarry, Cobble, and Rock, spread throughout the room in a linked encounter. As you kill each of them, they begin to merge until they finally combine into one massive creature, Quarry Cobble Rock.
After clearing the water of all adds, make sure that everyone in the group has some sort of water breathing ability. The Elemental Lord will periodically teleport players to different places in the water, and will cast a debuff on everyone that makes them walk on the bottom of the water and causes everyone to be slowed.
One of the funniest mobs in EQ2. Slam Crushingfoot is only a teenage elemental and as such doesn't take well to being hit by a group of mature adventurers. He will throw tantrums at regular intervals, trampling heavily away around the lift platform, immune to all damage. Focus instead on the couple of unlinked adds that will join the fight at these times. The tank should aggro the adds (and Slam when he comes back) and switch back to the named when they are dead. Around 15% health, Slam will get into such a state of fury that he smashes the platform, causing your group and himself to crash at the bottom of the shaft, unless you have some way of breaking the fall. Do not stand on wooden platform, but on stony edges around platform. Cloak of the Harvester or similar feather-fall will allow safe landing below. Once dead, you can loot the chest at the top of the elevator, and free the dirge pet at the bottom.
note: assure you do NOT kill Slam too quickly, lest he will not break platform, preventing progress into dungeon. Recommend having Cronus - Dwarf Templar Ally with, and have him do all the damage to Slam; if he is not with group, Slam will not progress through scripted tantrums. [best use: mentor to 85, remove all weapons and offensive buffs (those that do automatic damage), ungroup, target Slam, send Cronus into attack, target Cronus for duration of battle ] Slam should do three tantrums.
Clear the room first of the worshipping adds by pet pulling. Do not enter the room yet.
The Sentinels will both become aggro and attack you as soon as you enter the room.
note: these can be avoided if one chooses to by selecting the "rocky barrier" path: Jump off wooden scaffolding at /wa -185, -58, -1,013 with Cloak of the Harvester or similar feather-fall equipped, and a speed buff (SoW, Pathfinding, Pendant of the Interim, etc.) and float to opening (/wa -213, -86, -988) in cavern wall.
The Rocky Barriers must be targeted and destroyed quickly to avoid wipe, once through, jump to immediate left or right of the opening, and await the Giant Underfoot Mole's death from the rock that "mortally wounds him."
Have a group member with high damage and high health/mitigation cast the Guardian pet. The Guard's aggro stacks with the caster. Pull the adds away from the named, or some massive aoes (both damage and power drain) happen. The adds don't hit hard, either a second healer or the group member with the templar pet can heal whoever tanks the adds.
This is an epic x2 named, so prepare for a long fight. If you don't want to spend 30 minutes killing this mob, be sure to bring along the NPC pets from each of the various cages around the zone. Any pets that aren't acquired will buff the epic. Flurry, summoning abilities, healing abilities, and so on are available to the epic, be sure to get all pets in the zone. (if running without a full group, I recommend at least taking the dirge (gives the epic the ability to rez), and the templar (gives epic healing), the guardian gives the epic a 75% damage protection so that is a good choice too if you have the people))
When used Fyreflinger buffs the player with A Summoning Ally (When target takes any damage this spell has a 23% chance to cast Elemental Mutagenic Crippling on caster: Inflicts 589 - 1093 crushing damage on targets in AoE)