Destruction Warlock 8.3

[Motoko 9]

Havoc let you duplicate any single target spells casted on different targets, for 60% of their original value during those 10 seconds.

It is not a spell to be used in pure single target, rather whenever there are 2 or more

[Guest Tator]

Thanks for your response! That clarifies it. ?
 

[LeGoret 6]

In the Boss by boss section for Za'qul :

8.1. Tips

This is a single-target fight in 3 different realms, with periodic adds and light movement. During the first phase, dodge  Crushing Grasp tentacles. Keep  Immolate on every Horrific Summoners and try to maximize your  Havoc windows. Imp can dispel  Dread, in case you need to support healers, but keep in mind that doing so will trigger raid wide damage for each dispel. Save  Cataclysm for when Horrific Visions are grouped in melee range.

At 70% Za'qul will open 3 orange pools leading to the Delirium Realm for those assigned players. Inside the realm you gain 80% haste but you will take increasing shadow damage until you are forced out and back in the Physical Realm. Consider holding both offensive and defensive cooldowns if you are assigned to the Delirium Realm to maximize the amount of time and damage inside. Smart placement of  Demonic Circle and  Demonic Gateway can help navigate the room, especially when tasked to enter the Fear Realm, where you have to kill Horrific Summonersquickly.

 

Worth to mention that if you are in the delirium, and you play with Lucid dream (major essence) at rank 3, you gain massive leach buff that can be consider as a defensive cooldown (in particular if you are cleaving horrific visions with a havoc during it which i strongly advise). You can easily full regen with the high heal burst it provides.

 

[Guest Wiik]

Need to add in Meka rings for bis