Destiny 2 Hunter BuildPrismatic Mothkeeper

The main point of this build is to throw out as many moths as possible, so the aspects are pretty flexible. In difficult content, stylish is hard to forgo. It gives great survivability and is easy to proc given we have so many ways of debuffing enemies. Similarly, Winter's Shroud is picked for it's ability to slow enemies which provides intrinsic anti champ utility, as well as its buff to class ability recharge on use, which helps with melee uptime through gambler's dodge. Finally, in classic Bungie style, one of the most significant benefits of Shroud, that it gives 50% DR for 4 seconds on dodge, is completely absent from its description text in-game :D

Alternatively you could use Spectre, which provides additional survivability with the decoy as well as some extra damage through the released threadlings when it explodes. In at level content, you could also sub-in gunpowder gamble in place of Shroud, for its add clear potential.

Hope, Dawn and Purpose are pretty standard picks for any prismatic build right now for their utility and ease of use. Hunter's can throw a lot of melee abilities given dodge can be used to refresh them, and that makes Hope an obvious pick in order to improve dodge uptime. The synergy with Dawn is also pretty obvious, giving us a pretty much constant weapon damage buff. Finally, Purpose is often the first pick for survivability on prismatic, and pairs nicely with stylish, with invis allowing for risk-free orb collection. That said, it's definitely possible to experiment with alternatives to these fragments to see what works for you!

The next fragment, Dominance, is pretty much the only one that is required for the build. It states that arc grenades jolt targets. Since the loyal moths create an arc explosion when they reach targets, they benefit from this effect. This enables our two grenade charges to both blind and jolt targets, stunning both Overload and Unstoppable champions.

Finally, given you'll be getting so many light-based elemental kills, particularly if you use Ex-Diris or Tessellation, facet of Sacrifice enables us to top up our darkness transcendence meter. It states that kills with abilities whilst you have a light elemental buff grant bonus dark transcendence energy. Since Dawn will grant us easy radiant, we should benefit from this effect often. Additionally, we could change our equipped super to tether to allow overshields granted through Purpose to proc the fragment's effect. Finally, the loyal moths also split into two with each throw, one flies off to damage enemies and the other seeks an ally (or you) and provides a void overshield. The void overshield also counts as a light elemental buff. This fragment is also somewhat flexible though - you might find options that work better for your playstyle.

Ex-diris has obvious synergy with mothkeepers, but there are lots of viable options. Something with demo is helpful to top off grenade energy. Tessellation's alt fire mode is very powerful, and given the two grenade charges and their rapid recharge rate (and the fact that we're building into grenade recharge) enables us to use it often (it also works with prismatic nades). It also has built in demolitionist. That said, there is a bit of anti-synergy in that if you're consuming your grenade to fire tessellation, you're not gaining all the additional benefits that we've tailored the build around. Buried Bloodline is strong with more or less anything (wish I had it) and adds some extra survivability with devour. Ex-diris has one additional benefit in that makes you amplified, so you can get some more DR via the artefact mod Galvanic Armor. But, honestly, use whatever fits your preference.

Personally I prefer threaded spike, though I think you can make a case for withering blade - you get two charges, which helps provide grenade energy via impact induction, and you're already slowing enemies with dodge so the extra slow stacks with withering will help to fully freeze them. Again, this is mostly personal preference. Threaded spike severs, does good damage, and if you can master catching it (not hard after the changes) you can often just have it fully charged again right after using it.

For the super, you can go with either tether or withering blade. Both are great for add clear and control of the battlefield.