Best Destroy a Vault Robots to Buy

The Tier List Hub ranks Destroy a Vault robots by effective vault DPS. This page is the buying guide companion: when to tap Buy on the podium, when to skip, which duplicates to bank for fusion, and which units deserve Mutation Cores. Use both pages together with Index Luck and Upgrades so Cash never disappears into nostalgia Commons.

The one question before every purchase

Ask: Does this robot raise Gold per hour more than the same Cash spent on Robot Damage, Battery, or a new slot?

If yes, buy. If no — and it is not a cheap new Index unique — skip. That single filter beats memorizing every rarity badge.

Keep list (priority buys)

Buy or keep when the offer is:

• A mutated high-base chassis (mutation multipliers move tiers — see the hub S/A bands)
• A clean Legendary / Mythic-class tank that beats your weakest active slot
• An Epic that clearly out-DPS your starters even without a mutation
• A new Index unique at a trivial Cash cost (Index Luck every five uniques toward 62.5% at 76 robots)
• The fourth copy of a strong type after island two unlocks fusion

These are the robots that belong on overnight AFK boards (Offline Earnings) and Bosses-era lineups (Bosses).

Skip list (protect your Cash)

Skip when you see:

• Duplicate Commons you already indexed and do not plan to fuse
• Mid-price fillers while the next Robot Damage tier is affordable
• Pretty rarities that lose to a mutated lower rarity already in a slot
• Impulse buys right before an island gate when you need a Cash buffer (Islands)

Skipping is a skill. Empty envy on the podium should not empty your Smelter gains.

Fuse list (bank these duplicates)

After Robot Fusion unlocks on island two, bank duplicates of:

• Types already rated A/S on the Tier List
• Frequent rollers you actually want as board mainstays
• Any four-of-a-kind that will replace your current weakest pad

Remember: fused robots cannot be fused again. Do not burn four mediocre Commons into a fused mediocre unit unless inventory cleanup is worth more than waiting for better fodder.

Mutate list (Gem sinks that matter)

Spend Mutation Cores / UPDATE Gems on:

1. Your current highest effective DPS carry
2. A freshly fused keeper that will stay on the board
3. A mutated-capable mid-rarity that already outperforms clean higher rarities

Do not core temporary fillers you will sell after the next roll. Deep rules: Mutations.

Early, mid, and late buying profiles

Early game: Buy almost anything that fills empty slots. Prefer Damage upgrades when slots are full. Redeem Codes (RELEASE, UPDATE, 100K) — not case-sensitive — via How to Redeem.

Mid game: Skip weak Commons. Buy mutated offers and cheap uniques. Start fusion banks after island two. Keep Battery near Damage for Bosses pressure.

Late game: Chase Mythic / mutated carries, finish Index gaps for the 62.5% luck ceiling, and fuse only projects that change clear times.

Practical podium flowchart

1. New unique + cheap? → Buy for Index.
2. Beats weakest slot on effective DPS? → Buy.
3. Fourth copy of a fuseable high type? → Buy/bank.
4. Duplicate Common while Damage is affordable? → Skip.
5. Have Gems and a clear carry? → Core that carry before more podium shopping.

How this complements S/A/B/C bands

Hub band	Buying translation
S	Always prioritize; mutate and fuse first
A	Main board until S appears; strong fusion targets
B	Buy to replace Commons or for Index; skip weak dupes early
C	Fill early slots only; later buy solely as cheap uniques

Rarity text is a hint. Effective DPS (including mutation) is the truth.

Economy link

Every bad buy delays the Gold → Cash loop in Economy. Every good buy shortens vault timers, raises offline Gold, and funds the next Damage tier. During live Bosses patches, lean harder on the Keep list (Bosses Update).

Common buying mistakes

• Completing a Common zoo while Damage is underfunded
• Mutating a robot you will replace in ten minutes
• Fusing before island two or trying to fuse already-fused units
• Ignoring Index luck entirely until “endgame”
• Spending all Cash on rolls the same minute a new island gate opens

Related pages

• Tier List Hub — full S/A/B/C ranking logic
• Robots & Index and Index Luck — collection math
• Upgrades — when boards beat podium buys
• Robot Fusion — duplicate projects
• Getting Started — first-hour buy rules

Buy like an investor: keep power, skip clutter, fuse with intent, mutate keepers. That is how the best Destroy a Vault robots actually earn their slots.