General Tips-

• Use your soulstone on a class that can resurrect.
• Curse of Recklessness will stop a monster from running away for two minutes as well as lower their armor substantially. If there is no one else in the party to stop them, make sure to use this spell. If a fight will take a long time, use a different curse until they are low on health and about to run.
• Choose a pet to use based on the weaknesses of your party. If you need a secondary tank, use a Voidwalker. If you need damage, Succubus. Use Felhunter for casting mobs, and so on.
• Save your mana during easier fights. The warlock is designed around damage over time, and you will waste power if you use all your spells on a fight that will be over in 20 seconds.
• Always remember that monsters can only have eight total harmful spell effects on them.
• Keep soulshard usage balanced throughout a group. If possible, Soul Drain at the end of battle to regain your shards. If you run out of shards halfway through an instance, your usefulness to the party diminishes greatly.
• A lot of players don’t know about healthstones. Create one for each group member and replace them after a battle they were used in. Remember, these save your team from using potions.

Aggro Management-

• The warlock is geared towards damage over time and usually shouldn’t have a problem with aggro.
• If you need to get aggro off yourself or another group member, your pet is usually to be considered expendable. It’s better to have a pet die than a player. The healer might not have the mana to heal everyone, and your pet will create a buffer of time for the group to finish the fight.