Checkpoints Location:
1. To the right after defeating Bromach will be checkpoint Alpha.
2. Inside the cave of cavern seeker is the second checkpoint Beta.
3. At the end of the Earthworks area just before the last of the golems is the final checkpoint. The teleport will activate when you pull the boss Chrono-Lord Deios.
*Sentinel Talondras*
Do not cast when sentinel is casting Crushing Stomp, which will push all players away and add group damage to everyone. Player abilities will be locked.
On Mythic difficulty, the sentinel also gets Unrelenting ability which causes it to enrage, and you need to use your cooldowns to kill him as soon as possible when he gets this ability.
Tanks should clear the sentinel's stacks of Inexorable with the resonating orb because it will be boosted with Titanic Empowerment at 100 energy.
Healers should cast group heals over time to prepare for Brushing Stomp for the whole team. When the group gets Earthen Shards bleed effect, DPS should use their personal defensive cooldowns. For example paladin immunities, immunity potions, or dwarf Stormform.
*Emberon*
For normal difficulty, Emberon casts unstable embers randomly selecting one of the team members.
For Mythic, this targets everyone. He will enter the Sacred Barrier aura phase when his energy is maxed, and you can end this phase by killing the 4 keepers.
There will be Firewave ability every 3 seconds so you can let each DPS kill one of the keepers until they are all down. Don't cross Purging Flames during boss intermission phase. When he is casting Searing Clap, the tank should aim the boss facing away from the DPS and healer.
Healers should dispel the Burning Heat and check group member debuff statuses. Use healing cooldowns during Emberon's Activate Keepers phase because the whole group will be taking damage over time from the Fire Wave condition.
*Chrono-Lord Deios*
Tanks must aim Deios away from the group because his Sand Breath is a frontal area of effect damage ability. Make sure it is focused on the tank.
For mythic difficulty, Deios will also cast Time Sink which selects a random group member.
If you dispel Time Sink, it will become Time Eruption.
Healers should use healing cooldowns and time the large group heals to prepare for Rewind Timeflow. This is a 12 second group damage.