It's an extremely fun and unique exotic, unfortunately its use is extremely hamstrung by the limited default ammo reserves and the Release the Wolves perk. With a magazine of 30, a total of 120 shots, and an initial 5 round burst, that is then increased to a 10 round burst after a kill. Means that that you can exhaust all the ammo in roughly 12 or so shots, taking into account that you get 4 shots on the starting magazine. That's an ammo count of a power weapon. You would basically need the entirety of your armor perks to be dedicated to shotgun reserves, scavenger, and special ammo finder to have any chance of sustainability for it. I think either an increase in default ammo reserves or decreasing the burst count to 3 and then 6 after the Release the Wolves perk is activated would make the weapon a lot more viable in PvE. As it stands, it basically has the ammo reserves of a power weapon but requires the energy weapon slot for use. Which means the best use for Lord of Wolves is for mini-bosses/bosses in a single target scenario, but that is what power weapons are for, but often with the added benefit of either splash damage or much higher single-target damage. Those are just my thoughts on the exotic, would love to hear other's feedback as well.