Cyphers of the First Ones

Kind of frustrating it has you choose from 3 shoulder items with different Pocopoc enhancements and at this point they have explained absolutely nothing about how any of it works. Guess I'll choose a random one and hope I don't regret it....

I found this helpful:

You can find Cypher gear for all armor slots, but not weapons.

What's more, there are special abilities found only on Cypher gear armor pieces that can help you in your adventures in Zereth Mortis (and, in some cases, elsewhere in the Shadowlands). You'll be able to have up to three of these abilities at a time, and these abilities will scale in power with your current Cypher Equipment level, no matter the ilevel of the item in question.

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• Battle Rhythms - Battle Rhythms gear has abilities that enhance your effectiveness in combat within outdoor Shadowlands zones. These abilities can be found on cloth chest pieces, leather head pieces, mail shoulder pieces, and plate head pieces. All those Cypher gear pieces will have one of these three abilities.
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• Scouring – Scouring gear will cause your attacks to have a high chance to dispel buffs on your enemies. Or, if they don't have any, to put a debuff on the enemy that reduces damage dealt and increases damage taken.
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• Nova – Nova gear will cause your attacks to have a chance to deal bonus Cosmic damage with every hit.
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• Crystallic – Crystallic gear has a "crystallic" socket for a crystallic item obtained from Enhancement Consoles after unlocking the Elic Cypher research.
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• Pocopoc Harmony - Pocopoc Harmony gear has abilities that enhance your and Pocopoc's abilities within outdoor Zereth Mortis. These abilities can be found on cloth shoulder pieces, leather shoulder pieces, mail head pieces, and plate chest pieces. All those Cypher gear pieces will have one of these three abilities:
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  • Synchronous – Synchronous gear will improve Pocopoc's combat stats, regardless of what mode.
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  • Empathic – Empathic gear will allow Pocopoc to take over coreless automa and use its abilities without paying any Pocopoc energy.
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  • Broker's – Broker's Cypher gear will allow you to locate additional hidden treasure chests within Zereth Mortis with bonus treasure.
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• Personal Melody - Personal Melody gear has abilities that enhance your movement within outdoor Shadowlands zones. These abilities can be found on cloth wrist pieces, leather hand pieces, mail feet pieces, and plate hand pieces. All those cypher gear pieces will have one of these three abilities:
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  • Temporal – Temporal gear will increase your movement speed.
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  • Dimensional – Dimensional gear will allow you to cross great distances quickly, leaping straight to a target location within range (like all Cypher gear abilities, this becomes more powerful as you increase your Cypher equipment level, which will increase the range on the jump).
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  • Recreative – Recreative gear will allow you to re-create yourself upon death.
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How to choose your item reward:

TL;DR: Pick the one that lets Pocopoc take over creatures without spending energy.

"Equip: Grants Pocopoc the ability to take over creatures without consuming energy."

Extremely useful for obtaining Apocopocolypse Now, does not scale with item level (though supposedly scales with cypher level). Marginally useful for outdoor combat even after obtaining the achievement, as it lets you save energy for Pocopoc's other abilities. The option I would recommend, though not useful until you've unlocked [order-advancement=1932].

"Equip: Enhances Pocopoc's perception, allowing it to discover additional hidden caches."

Allows you to find [object=376046] while Pocopoc is searching for useful things, which can contain [item=189983] without fishing. Can be used immediately with no research, and technically helps improve your research speed, though the chests are rare and a pain to find. Like the previous option, does not scale with item level though supposedly scales with cypher level. A valid choice (more useful when you've obtained flying), but not recommended.

"Equip: Resonates with Pocopoc, increasing the stats and effectiveness of its forms and abilities."

Makes Pocopoc better in combat. Immediately useful (to a minor degree), but more useful with more cypher research. Unlike the others which are non-combat focused, you would ideally want a higher item level version of this ability through world/daily quests after you have upgraded your cypher research. Least recommended option.