Reverse: 1999 does a lot of things elegantly, but explaining its own build systems is not one of them. You pull an Arcanist, you level her, and then you are staring at Insight tiers, a Resonance grid full of empty nodes, a Psychube slot, and a Portray track, with the game politely assuming you already know which of these matters. The honest answer is that two of them, Resonance and Psychubes, carry most of a unit's real power, and the game barely explains either. This guide fixes that. We will go layer by layer, then tell you the order to actually spend your materials in.
If you are brand new, read the beginner guide and the afflatus system explainer first, because a perfectly built Arcanist still loses to a bad afflatus matchup. This guide assumes you know your Beast-Plant-Star and Mineral-Spirit-Intellect wheel and want to make a specific character hit hard.
The four layers of a build
An Arcanist's strength comes from four separate systems stacked on top of each other. Keeping them straight is half the battle:
| Layer | What it does | How you raise it |
| Insight | Raises level cap, unlocks skills and stat spikes | Insight materials, gold |
| Resonance | The stat grid: your primary source of ATK, HP, Crit, and reality/mental defense | Resonate materials (the wave items) |
| Psychube | Equippable gear giving stats plus a conditional passive | Pull or craft, then level and tune |
| Portray | Skill upgrades from dupes | Duplicate copies |
Notice what is doing the heavy lifting. Insight is the gate, but Resonance and the Psychube are where the numbers actually come from, and neither requires dupes. That is the good news for free and low-spend players: most of a unit's ceiling is reachable without ever pulling a copy twice.
Insight: the gate you have to clear
Insight is Reverse: 1999's ascension system, running from Insight I to Insight III. Each tier does three things: it raises the level cap, it hands out a stat bump, and it unlocks pieces of the character's kit, including their Ultimate and passive traits at the higher tiers.
The practical rule is blunt: an Arcanist is not really "built" until Insight III, because that final tier unlocks the passive and the full skill ceiling that most kits are balanced around. An Insight II unit is a work in progress. So Insight is not where you optimize, it is the toll you pay before optimization even begins. Push your priority carries to Insight III before you fuss over anything else, because the later layers scale off the higher level cap Insight unlocks.
Resonance: the layer that decides your damage
If you take one thing from this guide, take this: Resonance is the most impactful and most ignored system in the game. It is a grid of nodes, unique to each Arcanist, that you fill with Resonate materials to grant flat and percentage stats: attack, health, crit rate, crit damage, and reality or mental defense depending on the unit.
Two things make it powerful and easy to misplay:
- Higher resonance levels unlock better node tiers, and hitting certain node thresholds activates pattern bonuses that meaningfully outscale the individual stats. Half-filling a grid leaves a lot of power stranded.
- Different resonance patterns suit different roles. A carry usually wants a crit and attack-weighted pattern; a sustain or defensive unit wants health and defense. The game lets you choose, and choosing wrong is the single most common build mistake we see.
The move is to pick the pattern that matches the character's job, then fill the grid completely rather than sprinkling nodes across a half-dozen units. A carry with a fully realized, crit-focused resonance grid outperforms the same carry with a scattered, half-built one by a wide margin. Resonance is where your damage lives, so treat Resonate materials as your most precious build resource and commit them decisively.
Psychubes: the gear slot that punches above its weight
Every Arcanist equips one Psychube, and it is closer to a signature weapon than a piece of armor. A Psychube gives raw stats, but its real value is the conditional passive: effects that trigger under specific conditions, like "at the start of battle" or "when the wearer casts a certain skill." Matching the passive to the character is the whole game here.
A few durable principles:
- The condition matters more than the raw stats. A Psychube whose passive is easy to trigger on a given carry beats a statistically bigger one whose condition rarely lines up. Read the trigger, not just the numbers.
- Level the Psychube on your priority units. Like the character, a Psychube gains stats as you invest in it. A finished carry should have a leveled Psychube, not a base one.
- You do not need a five-star Psychube for everyone. Several accessible four-star Psychubes are best-in-slot or near it for specific roles. Do not gate a character's usefulness behind a rare Psychube you have not pulled; check what the affordable options give first.
For a worked example of how Insight, Resonance, and a matched Psychube come together on a real unit, see our Ramona build guide, which walks the whole stack on a single carry.
Portray: nice to have, never required
Portray is the dupe system. Pulling copies of an Arcanist raises their Portrait level, which upgrades their skills, usually improving damage multipliers, buff values, or duration. It is a genuine power increase.
It is also the layer to care about least as a free or low-spend player. Reverse: 1999 is deliberately generous about letting a Portrait 1 (single copy) unit perform its job. Dupes sharpen a character; they do not define whether she works. Chasing Portraits is a spender's optimization, not a requirement for clearing content, so never feel that a P1 carry is unfinished. She is finished when she hits Insight III with a full resonance grid and a matched Psychube. The Portraits are gravy.
The build order that actually works
Materials are finite, so spend them in the order that turns a fresh pull into a functional unit fastest:
- Insight III first. Nothing else matters until the kit is fully unlocked and the level cap is raised. Get here before you optimize anything.
- Fill the resonance grid, correctly patterned. Pick the crit-and-attack pattern for carries, the health-and-defense pattern for sustains, and complete it. This is your biggest single power jump.
- Equip and level a matched Psychube. Prioritize the passive's trigger fitting the character over raw stat size, then invest to level it up.
- Level skills to a sensible cap. Push the character's main damage or utility skill; you rarely need every skill maxed.
- Portray only if the copies fall into your lap. Do not pull for dupes unless you are a spender who has already finished everything above.
Do this for one carry at a time. The most common mistake in Reverse: 1999 is spreading materials thin across a wide bench, which leaves you with a roster of half-built Arcanists and no finished ones. A single fully realized carry clears content that five Insight II units cannot.
Wrapping up
Building an Arcanist is not complicated once you see the hierarchy: Insight unlocks the kit, Resonance and the Psychube supply the power, and Portray is optional polish. Commit to one carry, drive her to Insight III, complete a role-appropriate resonance grid, bolt on a Psychube whose passive she actually triggers, and you have a unit that pulls her weight in any afflatus-favorable fight.
From there, the rest is roster and matchups. Slot your finished carries into the team-building framework, check the tier list to see who is worth the investment, keep the codes page topped up for free materials, and know your pity math before you chase the next carry. Not sure the game is for you yet? Our full review makes the case.
