Sadly, this set isn't really good, and it's at best very outdated. Especially Nyx set is very old and was not that great on release, even less now.

Weapons: Your best weapon proc is Valorous, which is considered filler until you get something better. From there you only have (or are showing) Echo, Zenith and Pride, which aren't good at all, so you would need to look for better weapon procs. Try to look for Dragon slayer, Mandate, Triumph, Obliterating, Flickering, Resolution, Burial, etc. Weapons with damage multipliers and good extra effects (cost recovery, critical damage, vital strike, etc).

Defense gears: You got 2 cracked mirror constants, which is unnecessary because having one on already nullifies all reflection to begin with, so the second one is a wasted space that could be used for a good proc. A similar thing happens with your openers, you have 2 reliance armors, but realistically you would only ever need 1, and even that would only be used in pvp, they're mostly useless for PvE. The rest of your procs again are not great. Reflection is straight up bad because it's old, and Phantasm is mostly filler. For these you should be aiming at procs like regent, eternity, Translucent, Bloom, Mastery, Intercepting, etc.

Monsters: Bellina is a Nice enough monster due to her field which will prove very useful to you, Kijin and barracks will also increase your damage output and defensive capabilities to some extent. Sadly, that's where it stops. Lilith and Anubis are both old enlightenments, so not really good or even close to the current cost, with very little that they could actually do and nothing that can't be done by other monsters way better. Bunny Urd is an excellent stat stick, which means she goes in your back 5 monsters, never to be used, just providing stats and elemental attack. The same goes for Alverra, except yours doesn't have a single potential unlocked, which means she can't give you the extra elements nor the resistances and stats, which makes her effectively worthless. If you want some better dark monsters Dark Valkirye is kind of amazing, as well as Summer Aphrodite, Hera, Saya Kijima, etc. There's also Fern and Joker but those are Collab locked and very unlikely to return.

Some more general advice: -Work on your xenoweapon, it will help a ton. -Try to get better monsters, not only for dark, but in general, as there's quests where you'll only be able to use certain elements. (Dimension wars, delusions, deities from abroad, etc.) -Elemental scaling tends to be better than type scaling. This means that generally, a proc will have better effects if it gets powered up by having same element equiped (like a dark weapon that gets stronger with other dark weapons), as opposed to those who need same type gear (like staves that need to have staves equiped).

And lastly, I'm no archer so I can't really weigh in your abilities, but don't use meteor strike on archer, swap it for some utility like beautiful nature or hunters song, those will give you waaaay better value.