Notes

Destiny 2 Warlock Build
Most of this Warlock build centers around the exotic helmet Nezarec’s Sin and The Recluse. With this exotic, Void-damage kills increase ability energy recharge rate. You can mix and match the rest of your armor pieces as you see fit. However, we recommend using Discipline mods so you can get your grenade cooldown to below 50 seconds.

Helmet: Nezarec’s Sin
Armor Mods: Discipline Mods (Actual armor pieces don’t matter)
Weapon: The Recluse
Class: Void Warlock, Attunement of Hunger (Lower Tree)
If you don’t have The Recluse, any Void damage submachine gun or auto rifle will do. Here are some other viable alternatives:

Reckless Oracle (AR)
Every Waking Moment (SMG)
Gnawing Hunger (AR)
Age-Old Bond (AR)
Whatever you decide to use you’re going to want to equip the following mods:

Anti-Barrier Rounds (Auto Rifle/SMG Mod): Shield-piercing rounds designed to bypass combatant defenses. Strong against Barrier Champions. Usable on Auto Rifles and Submachine Guns.
Enhanced Submachine Gun Loader or Enhanced Auto Rifle Loader (Arms Armor Mod): Greatly increases reload speed of Submachine Guns / Auto Rifles.
Breach Refractor (Chest Armor Mod): Grants grenade energy on final blows with shield-piercing weapons or when a member of your fireteam shuts down a Barrier Champion’s ability.
Ballistic Combo (Chest Armor Mod): Grants melee energy on final blows with shield-piercing weapons or when a member of your fireteam shuts down a Barrier Champion’s ability.
Oppressive Darkness (Class Item Mod): Causing damage with a Void grenade adds a weaken effect to enemies.
You can probably see where we’re going with this. With the first four seasonal mods, every single enemy you (or anyone in your fireteam) kills, you’ll regain grenade and melee energy. This effect will be further increased by the effect of Nezarec’s Sin. We also like to throw on Oppressive Darkness so the enemies hit with our void grenades will be even easier to take down with Recluse.

By going the Attunement of Hunger tree you gain access to Devour which fully regenerates your health after a kill with your melee ability. It also gives additional health for a short time afterward from subsequent kills. Combined with the Insatiable perk, you can keep extending the Devour effect by killing more enemies. Insatiable also speeds up the recharge on your grenade.

All of this loops together for an arsenal of quickly regenerating grenades. And we mean fast. We’re talking regen times as short as five to ten seconds. With this build you can use your grenade as much as you like. It’s a bunch of fun and a departure from the norm.

There are many other builds to choose from as well. Thanks to other seasonal artifact mods you can also likely construct a really cool Arc based build as well.