Farm units are the economy backbone of every UTDZ team. While they deal minimal damage, their passive Gem income generation funds your entire progression — from summoning units to buying Evolution materials. This tier list ranks all Farm units and explains why the Fortunate trait is absolutely mandatory for any serious farmer.
Why Farm Units Are Essential
Many new players underestimate Farm units, but their income generation compounds massively over time:
| Metric | Without Farm Unit | With 1 Farm (Fortunate) | With 2 Farms (Fortunate) |
|---|---|---|---|
| Gems per wave | Base | +20% | +40% |
| Gems per hour (Story) | 300K | 360K | 420K |
| Gems per hour (AFK) | 80K | 96K | 112K |
| Monthly Gems (8hr AFK/day) | 19.2M | 23M | 26.9M |
A single Fortunate-trait Farm unit generates an extra 3.8M Gems per month from AFK alone. Two Farm units generate 7.7M extra.
The Compounding Effect of Farm Income
Farm unit income does not just add Gems — it compounds by enabling faster progression in every other system:
| Progression System | Without Farm Income | With Farm Income | Difference |
|---|---|---|---|
| Summoning rate | 5 summons/day | 8 summons/day | +60% |
| Trait Reroll budget | 100/week | 200/week | +100% |
| Evolution material purchase | Delayed 3 days | Immediate | 3 days faster |
| Featured banner pity | 2 months | 1.5 months | 2 weeks faster |
| Etherealization shard farming | Story Mode only | Story + purchase with excess | +20% shards |
The faster you accumulate Gems, the faster you can pull on banners, the faster you get S-tier units, which makes all content easier, which lets you farm even faster. This virtuous cycle starts with Farm units.
Farm Unit Rankings
| Rank | Unit | Tier | Best Trait | Income Rate | Combat Value |
|---|---|---|---|---|---|
| 1 | Fortunate Farm #1 | A | Fortunate | +20% base | None |
| 2 | Fortunate Farm #2 | A | Fortunate | +20% base | None |
| 3 | Any Farm (no Fortunate) | B | Any | Base rate | None |
Why Farm Units Are Ranked A-Tier Maximum
Farm units max out at A-tier because they provide zero combat value. Even the best Farm unit cannot deal meaningful damage. Their tier ranking reflects their economy contribution, not their combat performance:
| Factor | Farm Unit Impact | DPS Unit Impact |
|---|---|---|
| Wave clearing speed | None | Primary |
| Boss damage | None | Primary |
| Team survivability | None | Significant |
| Gem income | Primary | None |
| Team slot value | Economy only | Combat only |
The Fortunate Trait — Mandatory for Farm Units
The Fortunate trait provides +20% Income for farm units. This is the single most important trait for any farm unit:
| Trait | Effect on Farm | Income Impact | Tier |
|---|---|---|---|
| Fortunate | +20% Income | ★★★★★ | Mandatory |
| Ruler | +200% DMG, 1 placement | Useless (no combat) | Wasted |
| Sacred | -15% Cost | Minor savings | Suboptimal |
| Any DPS trait | Damage boost | Useless (no combat) | Wasted |
Never reroll a Fortunate trait off a farm unit. The income boost compounds over every wave of every game mode. See our traits guide for reroll priority.
Fortunate Trait Income Math
| Scenario | Base Income | With Fortunate (+20%) | Difference per Hour | Difference per Month |
|---|---|---|---|---|
| Story Mode farming | 300K/hr | 360K/hr | +60K/hr | +14.4M/month |
| Infinite AFK farming | 80K/hr | 96K/hr | +16K/hr | +3.84M/month |
| Challenge runs | 15K/run | 18K/run | +3K/run | +270K/month (90 runs) |
| Raid runs | 10K/run | 12K/run | +2K/run | +24K/month (12 runs) |
Over a month of active play, a single Fortunate Farm unit generates approximately 18M+ additional Gems compared to running without a Farm unit at all.
How Many Trait Rerolls to Get Fortunate
Fortunate has a 1% chance per roll. Here is the expected Reroll cost:
| Target | Probability | Expected Rerolls | Rerolls to Guarantee (~95%) | Farming Time |
|---|---|---|---|---|
| First Fortunate | 1% per roll | 100 | 300 | 3-5 days of Challenges |
| Second Fortunate | 1% per roll | 100 | 300 | Same |
| Fortunate on specific unit | 1% per roll | 100 | 300 | Same |
100 Rerolls is achievable in approximately 3 days of consistent Challenge farming. Given that Fortunate generates 3.8M+ extra Gems per month, this is one of the highest ROI investments in the game.
Farm Unit Economy Analysis
Income Per Game Mode
| Mode | Base Income | With Fortunate (+20%) | With 2 Fortunate (+40%) |
|---|---|---|---|
| Story Mode (per clear) | 10K Gems | 12K Gems | 14K Gems |
| Infinite AFK (per hour) | 80K Gems | 96K Gems | 112K Gems |
| Challenges (per run) | 15K Gems | 18K Gems | 21K Gems |
When to Add a Second Farm Unit
| Team Stage | Recommendation | Reason |
|---|---|---|
| Early game (1 S-tier DPS) | 1 Farm only | Need DPS more than economy |
| Mid game (2+ S/A DPS) | 1 Farm still | Balance combat and economy |
| AFK farming team | 2-3 Farms | Maximize passive income |
| Raid team | 1 Farm only | Need maximum combat power |
| Story Mode speed team | 1 Farm | Combat efficiency matters more |
One Farm vs Two Farms — Detailed Comparison
| Metric | 1 Farm (Fortunate) | 2 Farms (Fortunate) | Is 2nd Farm Worth It? |
|---|---|---|---|
| Gems/hour (Story) | 360K | 420K | Yes for dedicated farming |
| Gems/hour (AFK) | 96K | 112K | Yes for overnight AFK |
| Combat DPS loss | 0 (1 slot) | 1 DPS slot lost | Significant in raids |
| Team flexibility | 5 combat slots | 4 combat slots | Less flexible |
| Monthly extra income | 3.8M | 7.7M | 3.9M extra from 2nd farm |
Farm Unit Placement Strategy
Farm units should be placed where they generate maximum income while not taking valuable DPS positions:
| Position | Income | Notes |
|---|---|---|
| Near enemy spawn | Highest | Proximity to early waves = more income |
| Near path center | High | Covers most wave traffic |
| Far from path | Lower | Reduced income from distance penalty |
| Hill position | Same rate | Income is not position-type dependent |
Farm Placement and Income Mechanics
Farm unit income is calculated based on proximity to enemy wave paths. The closer the Farm unit is to the path, the more income it generates per wave:
| Distance from Path | Income Modifier | Practical Impact |
|---|---|---|
| Adjacent to path | 100% (base) | Maximum income |
| 1-3 tiles from path | 90% | Minor reduction |
| 4-6 tiles from path | 70% | Noticeable reduction |
| 7+ tiles from path | 50% | Significant loss — avoid |
Always place Farm units as close to the enemy path as possible without blocking your DPS units from their optimal positions.
Farm Unit Investment Guide
Evolution Priority for Farm Units
| Evolution Level | Cost | Income Increase | Recommended |
|---|---|---|---|
| Evolution 1 | 30 Stones + 100K Gems | +5% income | Yes — cheap and effective |
| Evolution 2 | 50 Stones + 200K Gems | +5% income | Optional — diminishing returns |
| Evolution 3+ | 90+ Stones + 500K+ Gems | +5% per level | No — save for DPS units |
Etherealization Priority for Farm Units
| Shard Type | Income Increase | Cost | Recommended |
|---|---|---|---|
| Mythic | +5% per shard | Farmable from Story Mode | Yes — cheap income boost |
| Exclusive | +3% per shard | Challenge/Raid drops | Optional — marginal gain |
| Secret | +2% per shard | High-tier Raids only | No — save for DPS units |
Relic Recommendations for Farm Units
Farm units benefit from a completely different set of relics compared to DPS units:
| Relic Slot | Recommended Stat | Why | Priority |
|---|---|---|---|
| Top | HP | Survivability keeps farm alive longer | Medium |
| Bottom | Cost Reduction | Cheaper deployment | Low |
| Accessory | Income Bonus | Direct income increase | High if available |
Do not invest premium relics (like Fused Warrior or Warlord sets) in Farm units. Those belong on your DPS carries.
Common Mistakes with Farm Units
| Mistake | Impact | Fix |
|---|---|---|
| Not running a Farm unit at all | Lose 20%+ income | Always include 1 Farm in your team |
| Using DPS traits on Farm units | Zero combat value, no income boost | Only use Fortunate on Farm units |
| Over-investing in Farm evolution | Wasted stones and Gems | Evolution 1 is sufficient |
| Placing Farm far from path | Reduced income from distance penalty | Place adjacent to enemy path |
| Using Secret shards on Farm units | Wasted shards on non-combat unit | Save Secret shards for S-tier DPS |
| Removing Farm unit for more DPS | Short-term gain, long-term loss | Farm income compounds over time |
Farm Unit AFK Farming Setup
For AFK Gem farming, the Farm unit is the most important component:
| Team Slot | Unit | Purpose |
|---|---|---|
| 1 | Farm (Fortunate) | +20% passive income |
| 2 | Primary DPS | Clear waves to sustain AFK |
| 3 | Secondary DPS | Backup wave clearing |
| 4 | Support | Keep team alive |
| 5 | Farm #2 (optional) | +20% more passive income |
| 6 | Any sturdy unit | Fill slot for survivability |
For detailed AFK farming strategies, see our AFK farming guide and gems farming guide.
Frequently Asked Questions
Should I invest Evolution materials in Farm units? Only for Evolution 1 — the base stat boost is cheap and makes them slightly more survivable. Do not invest beyond Evo 1. The income increase from Evolution 1 (+5%) pays for itself within days.
Is it worth etherealizing Farm units? Mythic etherealization only — it increases their income rate by +5% per shard. Do not invest Exclusive or Secret shards in Farm units. Those shards should go to your S-tier DPS carries where they provide multiplicative combat scaling.
Can Farm units deal damage? Negligibly. Their DPS is extremely low. They exist purely for income generation. Never trait them for DPS — always chase Fortunate. A DPS-traited Farm unit is a wasted team slot.
What is the income difference between 1 and 2 Farm units? Two Fortunate Farm units provide 40% more income versus 20% from one. In AFK farming, this equals an extra 32K Gems per hour. Over an 8-hour overnight session, that is 256K extra Gems — significant for passive income. See our gems farming guide for detailed comparisons.
Should I reroll Fortunate on Farm or chase Ruler on DPS first? Reroll Fortunate on your Farm unit first. The +20% income compounds over time and funds all future trait rerolls. Once Fortunate is secured, then chase Ruler on your primary DPS. The math favors economy-first in virtually all scenarios.