
World Atlas
400 doubloonsArrr, provides support income and wards.
Game patch, matey 26.20Data Dragon 16.20.1
Arrr, reference patch 16.20.1
Yuumi has an established low-income Support course wit' useful course pressure, protection, engage or crew utility.
These patches keep recommendation review, build checks and item lookup on separate charts, matey. Fresh item data does not finish a build review.
Arrr, ranked · Support · Ranked Flex, matey
Follow th' completed-gear order as a pre-battle reference. Components and owned gear do nay create extra inventory slots.

Arrr, provides support income and wards.

Completes th' utility-focused support quest.

Arrr, cleanses removable crowd control from an ally.

Arrr, improves repeated healing in longer fights.

Adds attack speed and on-hit damage when th' chosen attached carry can use both.

Completes th' six-gear inventory wit' movement speed and trick haste fer repeated late-battle spell rotations.

Completes th' six-gear inventory wit' hull and a slow fer spellcasters who need repeated control.
Shipshape loadout choices
Recommendations await inspection
Arrr, best when: Apply anti-heal only when repeated healing be materially changing fights.
Arrr, best when: Locket gives nigh th' ship crewmates an immediate shield when foe burst lands together.
Arrr, best when: Shurelya's movement speed helps th' crew engage or disengage when positioning be th' problem.
Recommendations await inspection
Arrr, runes and summoner spells
Yuumi can follow her Bot partner through You and Me!, so this reviewed Support chart uses Heal fer th' pair and Ignite fer course pressure instead o' spending a slot on Teleport.
Replace Ignite wit' Exhaust when one diver or short burst window be th' clearer threat to Yuumi and her Bot partner.
Tell th' Bot partner that Yuumi be carrying Heal so th' pair does nay duplicate it without a reason.
Arrr, static alternatives
These choices be nay picked from live scores. Use one only after ye identify th' stated clash problem yourself.

Arrr, Oblivion Orb supplies healing reduction without committing to a completed Morellonomicon. Skip both when healing is not the problem or an ally already covers your target reliably. Healing reduction does not reduce shields.
Arrr, Conditional component, not a core item. Complete Morellonomicon only when its stats and slot efficiency justify delaying another purchase.
Locket gives nigh th' ship crewmates an immediate shield when foe burst lands together.

Shurelya's movement speed helps th' crew engage or disengage when positioning be th' problem.
Arrr, Situational AP purchase
Arrr, Buy healing reduction when enemy healing or regeneration is deciding fights and you can keep damaging the relevant target. Grievous Wounds reduces healing; it does not reduce shields, magic damage or crowd control.
Arrr, Oblivion Orb can provide healing reduction without immediately paying for a completed Morellonomicon. Fit the component around your core damage, mana and survival needs; check the current queue's item tooltip.
Arrr, Complete Morellonomicon when its stats and slot efficiency suit your build. Do not treat it as a mandatory first item just because your champion deals magic damage.
Arrr, Multiple Grievous Wounds sources do not add their percentages together. Another reliable applier may cover the same target, but you may still need your own source for a separate fight or target.
Arrr, Repeated spell damage and damage over time can maintain coverage more reliably than a single hit. Match the purchase to your actual spell access, enemy sustain and the teammates who can apply the debuff.
Arrr, If you die before dealing damage, you apply no healing reduction. If your target dies before healing, there is little healing to prevent. The debuff applies on qualifying damage immediately; it does not need to build up. It remains briefly after your last hit, so teammates can benefit even after you disengage.
Arrr, Only healing during the active debuff counts. For example, 40% reduction prevents 80 of a 200-point heal, or 400 of a 1,000-point heal, before other modifiers. Compare that with the damage, penetration or survival you delayed; neither example guarantees a kill. Healing after the debuff expires is unaffected.
Arrr, See the Arrr, oblivion Orb and Arrr, Morellonomicon Arrr, references for current effects and queue availability. These are situational decisions, not a measured best-build claim.
Arrr, kit reference
Trick names, descriptions and numeric fields come from Riot Data Dragon. Practical reads be independently written; th' present in-battle tooltip remains authoritative.

Arrr, what it doesEnglishPeriodically, when Yuumi strikes a champion with an attack or ability, she restores health to herself and the next ally she Attaches to. While Attached, Yuumi generates a special bond with her allies. The ally with the strongest bond enhances Yuumi's abilities while she is Attached to them.
Arrr, practical readFeline Friendship be th' always-on rule shaping Yuumi's normal trading and fight pattern. Watch its in-battle state afore committing.

Arrr, what it doesEnglishYuumi fires a missile, dealing damage and slowing first target hit. It deals bonus damage and an enchanced slow if it takes at least 1.35 seconds to get to its target. While on her Best Friend, the slow is always enhanced and grants bonus On-Hit damage to her ally. While Attached, the missile can be controlled with your cursor for a brief period.
Arrr, practical readProwling Projectile be a ranged cast involving a slowing effect and basic-attack interaction. Respect its line or target area, and avoid spending it when th' foe can simply step astern afore th' fit fer th' captain's eye exchange.

Arrr, what it doesEnglishYuumi dashes to a target ally, becoming untargetable from everything except turrets. While on her Best Friend, she gains Heal & Shield Power and grants her Ally On-Hit healing.
Arrr, practical readYou and Me! contributes protection or sustain and basic-attack interaction. Its value changes wit' cooldown, range and target access; recognise th' setup afore moving into its effective area.
Th' protection or sustain be part o' th' cast's value. Compare its timing wit' incoming damage rather than reading only th' offensive effect.
Th' cast changes position or access. Sailor record fer where th' champion finishes, nay only where th' trick begins.

Arrr, what it doesEnglishShields Yuumi and boosts Move Speed and Attack Speed. If she's attached, she passes it to her ally instead.
Arrr, practical readZoomies contributes basic-attack interaction. Its value changes wit' cooldown, range and target access; recognise th' setup afore moving into its effective area.
Th' protection or sustain be part o' th' cast's value. Compare its timing wit' incoming damage rather than reading only th' offensive effect.

Arrr, what it doesEnglishYuumi channels five waves that damage enemies and heal allies. Yuumi can move, attach, and cast Zoomies! while channeling. While on her Best Friend, this spell also follows her mouse.
Arrr, practical readFinal Chapter contributes protection or sustain and damage. Its value changes wit' cooldown, range and target access; recognise th' setup afore moving into its effective area.
This cast has a wind-up, charge or channel. Movement, interruption or a changing target state can matter afore th' effect completes.
Adapt th' course
Judge th' whole course or sea chart state, nay only personal kills. Pick th' situation closest to th' present battle.
Deny space wit' yer course partner, but keep th' carry moored to th' wave instead o' roaming at every opportunity.
Move first aboard wit' an ally, establish vision and protect th' course yer crew will use to enter.
Set sail only when crewmates can follow, then change to peel if an foe reaches th' protected carry.
Hold th' trick that makes foes respect yer course and trade when both Bot-course partners be shipshape.
Recall and move on seaworthy wave timings; an unsupported roam can cost th' carry an entire wave or a dive.
Control one approach and keep enough protection fer th' foe's most likely engage.
Stay fer a crashing wave, block a dive and avoid spending th' key defensive trick on low-value poke.
Enter darkness wit' another sailor and ward th' nearest useful entrance instead o' reaching fer deep vision.
Peel first aboard and punish overextension. A blind engage rarely repairs a losing battle.
Pings, movement and prizes
Keep th' carry moored to seaworthy space. Signal peril early enough to prevent th' fight, nay after protection be already late.
Pings create a shared course; they do nay replace checking waves, vision and who can move.
'Round a minute afore Dragon, ping th' course, spend doubloons if needed and make sure Bot and Mid know whether they can move.
Walk wit' th' Jungler or another ally. Sweep one course, place useful entrance vision and ne'er face-inspect alone.
Inspect nigh th' ship waves and foe positions. Hold th' spell that either starts a reachable fight or protects yer main damage dealer.
Keep enemies astern from th' seaworthy entrance, mark th' reachable threat and avoid chasing so far across th' waters that Dragon be left unprotected.
Later prizes: Use th' same pattern fer Rift Herald or Baron: communicate first aboard, move through controlled vision wit' an ally, then choose engage or peel afore th' fight begins.
Use th' chart
Compare a specific foe, return to th' champion overview, or choose another champion without losing th' queue distinction.