Landslide

Earth Song Falls
The waterfall descent and the Scepter portal lead into the inner caverns. Take the side passages for Tinkerer Gizlock and Landslide before committing to the final lake. Keep pulls on the cleared ledges, and leave enough room behind the tank to recover from Landslide's knockback without falling away from the group.

Landslide
Elite GiantLandslide combines ledge-threatening knockback with Trample and a Summon Shardlings stun that leaves the group unable to answer the new attackers immediately.
Abilities

Knock Away
Inflicts normal damage plus 30 to an enemy and knocks it back.
Put solid rock behind the tank so Knock Away does not throw them off the ledge or out of healing range.

Trample
Keep the healer and ranged players away from Landslide's feet to avoid Trample's nearby damage.

Summon Shardlings
Summons Theradrim Shardlings every 2 seconds and stuns enemies in an area for 8 seconds.
Keep the tank healthy before the summon stun, then collect the Theradrim Shardlings as soon as control returns.
Tank- Fight with rock behind you for Knock Away rather than your back toward the drop. Collect Theradrim Shardlings when the summon stun ends so they do not remain on the healer.
Healer- Stay away from Trample while retaining sight of the tank's wall position. Keep the tank healthy ahead of Summon Shardlings and resume healing promptly when its stun releases you.
Damage- Keep ranged attacks outside Trample and switch to the gathered Theradrim Shardlings when the stun ends. Avoid chasing a knocked-back tank toward an uncleared ledge.