Destiny 2 Warlock BuildNezarec's Sin w/ Choir of One

I've seen a lot of people running Spirit of Harmony exotic class item or battle of harmony exotic armor for Choir of One build. I've tried it and it feels horrible to play for a few reason.

1) Locked down super to Nova Bomb. It's not a bad super because it has very good burst damage, but for any solo content, it will feel significantly worse when you don't have Song of Flame when it's literally the best roaming super in the game right now. 2) Harmony only feed back super energy based on enemy rank, but Nezarec's Sin is a fixed increased ability and super regen with any void kills. So, not only will you get super energy , you are able to get more ability to spam (especially phoenix dive).

Overall, Nezarec's Sin is just so much better on Prismatic warlock compared to any Harmony roll. Even with Battle of Harmony (chest armor version, not exotic class item) does have an edge with intrinsic 2 void surges when you have your super charged, but you can just put 2 void surges on your boots with 1 time dilation mod on class item to achieve nearly the same result. If I had to choose an intrinsic 2 void surges that only active when you have your super charged, or 2 void surges that I can put on the boots and get more ability energy with Nezarec's Sin, I'll always pick the latter one :)

The answer is actually quite simple.

1) Dark energy. This build has Choir of One and a void heavy machine gun to fill the light meter, and you want to use it as often as possible because Nezarec's Sin for faster ability and super regen with any void kills. So, choosing Vortex grenade will make dark energy meter goes super slow because the only dark energy source will be only rely on arcane needle (arcane needle will still be very slow even with that 300% regen speed). And you want to have as many transcendence as possible because you are playing on Prismatic, do you remember that????? 2) Facet of Ruin interaction. Solar buddy with Hellion does come up with a lot of ignitions pretty often, especially with Nezarec's Sin getting that 200% class ability regen, hellion uptime is near infinite by just killing enough adds. So, a bigger ignition damage and higher shatter damage against frozen targets is very good. Also, it will fulfill part of the "ice and fire" dream on warlock :) 3) Decent crowd control. Even without Osmiomancy giving coldsnap better tracking and fixed grenade energy back for a more consistent freeze. It's actually super helpful in a lot of situation to freeze a lot of targets at once, but you just need to throw it a bit closer for it to work. Also, vortex grenade damage is not that great at higher difficulty content, freezing targets will be be a lot more beneficial for better survivability.

The call on the kinetic slot is just too good to be ignored. It helps with more grenade spam with Demolitionist, Desperate Measure for chunking down tanky enemies. Also, as a rocket sidearm, it gets A LOT OF dark energy that if you want, you can just shoot a couple shot to get transcendence. Primary weapons will take significantly longer to do the same.

BTW, I consider Choir of One as a primary weapon because of its high reserve (even after the nerf in EP 2 it will still be very good) and very good damage. A special ammo finder can pretty much fix the issue.