Destiny 2 Titan BuildArc dummy

Although it was changed, Heart of Inmost Light is still a very potent exotic if played around correctly. Getting the empowered x2 buff for all abilities won't be as it was, but getting the x2 buff for Pulse Grenades is possible, and is the best way to play due to the strength of Pulse Grenades. In order to do this prioritize using abilities in the order in which you care about them from least to most. To get the most out of grenades, use class ability, then melee, and finally the grenade. This way Pulse Grenade will have the best buff when they are used.

Pulse Grenades will create Ionic Traces for ability regeneration from Touch of Thunder, Jolt targets from Spark of Shock, and last longer from Spark of Magnitude. On top of those buffs, the mods are based around the grenade via Firepower for making Orbs of Power, Bolstering Detonation and Momentum Transfer for class/melee energy on grenade hits, and Bomber and Innervation for grenade energy when using Barricade or picking up orbs. Seismic Strike has the utility of blinding Enemies which can handle Unstoppable Champions. As for class ability, if the content is easier, Thruster is a viable option because of its cooldown. Otherwise Barricade is the safer play.

The two weapons to have are Thunderlord and a Void energy weapon. Thunderlord is a jack of all trades and can create Ionic Traces with Spark of Discharge.