Throne of the Tides Mythic+ Dungeon Guide

Avoid the Geyser swirlies that spawn throughout the fight.

Be sure to interrupt every cast of the random target Water Bolt spell.

Shock Blast targets a random player, move away with the explosion so you don’t cleave your party and give them time to dodge the Shock Orbs that spawn.

Heal through the random target damage done by Focused Tempest.

At 60% and 30% health the boss will become immune and spawn one Naz’jar Honor Guard, two Naz’jar Frost Witches, and several Deep Sea Murlocs. When these are defeated she returns to her regular phase.

Naz’jar Honor Guard will buff themselves with Slithering Assault which can be soothed, and will occasionally jump to a random player and channel the Trident Flurry cone through their position. Step out of the frontal and use a CC to stop this effect.

Naz’jar Frost Witches will Frostbolt the tank, applying a magic slow on successful casts. They will also buff themselves with Icy Veins which can be purged. I recommend interrupting these 2 mobs quickly at the start of the add phase and grouping them up between their spawns near where the Honor Guard starts.

Deep Sear Murlocs will just use Leaping Thrash on random players so you’ll want to be loosely spread in this phase.

Crushing Claw targets the tank, use a defensive for the hit and following damage amp.

Festering Shockwave is the main source of damage on this fight, use defensives and healing CDs to survive both the initial hit and the 12s DoT.

Bubbling Fissures spawn on 3 random players and will remain in play for the rest of the fight. When the boss casts Awaken Ooze, these fissures will animate wherever they are for 12s and begin to fixate on a random player. These oozes will apply Bubbling Ooze to them if they are near, and while they are immune to CC if they are hit by any ability they will be knocked back. I recommend staying as a group and positioning such that these mobs must run through the boss to reach you, allowing the tank and melee players to knock them back with AoE abilities when they get close.

Random players will be hit with Flame Shock through the first phase of this fight, you’ll want to use your magic dispel on CD here so you don’t get overwhelmed by these DoTs.

Earthfury spawns multiple swirlies under all players over the 2s duration, walk in a staggered fashion to avoid these and either stack with other players or stay away from them entirely.

Stormflurry Totem drastically increases the tank damage intake while alive, so make sure to swap to these right away and have your tank use a defensive.

When the boss reaches 25% HP, Mindbender Ghur’sha will jump off and engage you herself, healers just be careful when this happens as sometimes healing aggro has built up on this mob over the first phase.

When Terrifying Vision is cast use one of the pillars in the room to LoS and avoid the effect. If you are hit you can use a magic dispel to clear the fear. Outside of this, you just take constant ticking damage in this phase from Mind Rot which needs to be healed through.

Tanks make sure to stay in melee range or the boss will spam cast Foul Bolt at you. You’ll also want to be away from the rest of your party as the tank buster Murk Spew is also a frontal. Use a defensive for this hit if needed.

Healers be prepared to keep players up for the Putrid Roar cast and DoT, and players make sure to defensive if you are low going into this ability.

Blotting Barrage targets 3 players, dealing damage to them and leaving behind a pool of Blotting Darkness. These pools will constantly grow throughout the fight unless one of the two players buffed with Cleansing Flux stands on top of them to soak them up. If you can have the players debuffed by Blotting Darkness get as close together as possible without cleaving their effect to make clearing the puddles easier.

Occasionally Deluge of Filth swirlies will spawn around the room, creating 2 Splotch adds and 3 Sludge adds. 

Sludges just need to be tanked and will apply the stacking Grimy DoT to the tank, then on-death will explode with Gushing Ink, leaving behind another puddle that must be cleared, so try and tank these mobs close to existing puddles to maximize space.

Splotch adds will just target random players with Ink Blast, so make sure they are interrupted quickly so they can be grouped and cleaved down with the Sludges, then use additional interrupts and CCs to prevent further casts.

In terms of positioning here, I recommend the 4 non-tank players stay relatively close together, rotating around the room as they create puddles. The tank should be positioned ahead of them, as this allows the frontal to be pointed away from the group while also allowing the tank to quickly group up mobs to be cleaved down near any melee players in your group.

Once you defeat the Ink of Ozumat, you will be empowered with Tidal Surge while taking constant damage from Raining Darkness, so it's just a race to kill Ozumat before they kill you.