Not all units perform equally across every wave bracket in Roll to Defend. The zombie difficulty scaling means units that dominate early waves may struggle in later brackets, and high-rarity units are wasted on trivially easy content. This guide recommends the best units for each wave bracket, considering rarity requirements, merge levels, and optimal defense compositions for maximum efficiency.
Understanding which units to deploy at each wave bracket is essential for efficient progression. Over-investing in early waves wastes resources, while under-preparing for difficulty jumps leads to repeated failures. This wave-by-wave guide ensures you always have the right units for the right content.
Wave 1-10 — Starter Defense
The first ten waves in Roll to Defend are designed to be survivable with almost any units. Your priority is getting units on the field quickly rather than optimizing for specific unit types. Common units at 1/10K odds are perfectly adequate for this bracket.
Recommended unit composition:
- 1 carry DPS unit (any rarity — common units work fine)
- 1-2 support/filler units (common units are acceptable)
- Focus on rolling enough units to fill all deployment slots
| Unit Role | Minimum Rarity | Recommended Merge | Position |
|---|---|---|---|
| Carry DPS | Any (C tier OK) | None needed | Forward center |
| Support | Any | None | Behind carry |
| Filler | Any | None | Flanks |
Do not spend coins upgrading units during waves 1-10. Save every coin for rolling and zone purchasing. The wave rewards are minimal at this bracket, so efficiency matters more than perfect unit selection. For the complete beginner walkthrough, see our Beginner Guide.
Wave 11-25 — Mid-Early Defense
Waves 11-25 introduce noticeable difficulty scaling. Common units begin struggling with zombie HP, and you need at least one rare unit (1/100K) or a merged common unit to serve as your primary carry. This is the bracket where merging becomes important.
Recommended unit composition:
- 1 rare carry DPS (1/100K preferred, or merged common)
- 1-2 common/uncommon support units
- Begin merging duplicates of your best DPS unit
| Unit Role | Minimum Rarity | Recommended Merge | Priority |
|---|---|---|---|
| Carry DPS | 1/100K (B tier) | Merge 1 | Roll/merge for this first |
| Secondary DPS | 1/10K-1/50K | None | Deploy available units |
| Support | 1/10K | None | Fill deployment slots |
The transition from Wave 10 to Wave 11 is the first real difficulty jump. If your common units are failing, you need to either merge them for a stat boost or roll for a rarer replacement. For merging strategies, see our Merging Guide.
Wave 26-50 — Mid-Game Defense
The mid-game bracket requires multiple rare units or one well-merged rare unit. Zombie HP and speed increase significantly, and common units are no longer viable as primary DPS. This is where unit quality directly determines progression speed.
Recommended unit composition:
- 1 merged rare carry (1/100K at Merge 2+, or 1/1M at Merge 0)
- 1-2 rare/uncommon support units
- 1 tank unit for carry protection
- Merge your carry to at least Merge 2 before Wave 40
| Unit Role | Minimum Rarity | Recommended Merge | Key Stat |
|---|---|---|---|
| Carry DPS | 1/100K (B tier) | Merge 2+ | Maximum DPS |
| Tank | 1/100K | Merge 1+ | HP/defense |
| Support | 1/50K+ | Merge 1 | Healing/utility |
The Wave 25-26 transition is a major wall for many players. If you are stuck, focus on merging your best DPS unit and adding a tank unit for protection. For wall-breaking strategies, see our Zombie Waves Guide.
Wave 51-75 — Late-Game Defense
Late-game waves demand high-rarity units working together as a coordinated defense. A single carry unit is no longer sufficient — you need DPS, tank, and support units all performing their roles effectively.
Recommended unit composition:
- 1 high-rarity carry DPS (1/1M preferred, or 1/100K at Merge 3+)
- 1 tank unit (1/1M or 1/100K at Merge 2+)
- 1-2 support units (1/100K+)
- Full deployment of 5+ units with balanced roles
| Unit Role | Minimum Rarity | Recommended Merge | Critical For |
|---|---|---|---|
| Carry DPS | 1/1M (A tier) | Merge 1+ | Wave clearing |
| Tank | 1/1M or 1/100K M2 | Merge 1+ | Carry protection |
| Support | 1/100K | Merge 1 | Healing/utility |
| Secondary DPS | 1/100K | Merge 2 | Backup damage |
Epic units at 1/1M become essential for reliable wave clearing in this bracket. If you have not pulled an A tier unit, maximize your B tier unit's merge level and surround it with tank/support units. For unit rankings, see our Unit Tier List.
Wave 76-100 — Endgame Defense
Endgame waves require the best units in Roll to Defend. A-tier and S-tier units with multiple merge levels are essential. The zombie HP scaling at this level is extreme, and only fully optimized defenses can survive consistently.
Recommended unit composition:
- 1 S-tier or A-tier carry DPS (1/1B+ or 1/1M at Merge 3+)
- 1-2 A-tier tanks (1/1M at Merge 2+)
- 2-3 A-tier support units (1/1M at Merge 1+)
- Full 5-6 unit deployment with no weak links
| Unit Role | Required Rarity | Required Merge | Without This |
|---|---|---|---|
| Carry DPS | 1/1M minimum | Merge 3+ | Cannot clear waves |
| Tank | 1/1M | Merge 2+ | Carry dies |
| Support | 1/100K+ | Merge 2+ | Insufficient healing |
| Secondary DPS | 1/1M | Merge 1+ | Insufficient total DPS |
Wave 100+ — Extreme Endgame
Beyond Wave 100, only the most optimized defenses with S-tier units, maximum merge levels, and perfect positioning can survive. This bracket is for players who have completed multiple rebirth cycles and accumulated extreme luck bonuses.
For the complete rebirth strategy to reach this level, see our Best Rebirth Strategy.
Advanced Tier List Analysis and Unit Strategy
Beyond the basic tier rankings, experienced players understand how unit value changes based on game stage, available resources, and synergistic combinations. This section covers the advanced analysis that helps you make optimal unit deployment decisions.
Tier Value Shifts Based on Merge Level
The tier list changes dramatically when merge levels are considered. A merged mid-tier unit can outperform an un-upgraded high-tier unit, making merge potential a critical factor in unit evaluation:
| Base Tier | Unmerged Rating | Merge 1 Rating | Merge 2 Rating | Merge 3 Rating |
|---|---|---|---|---|
| S (1/1B+) | 10/10 | 11/10 (S+) | 11.5/10 (S+) | 12/10 (S+) |
| A (1/1M) | 8/10 | 9/10 (A+) | 9.5/10 (A+) | 10/10 (S-) |
| B (1/100K) | 6.5/10 | 7.5/10 (B+) | 8.5/10 (A-) | 9/10 (A-) |
| C (1/10K) | 3/10 | 4.5/10 (B-) | 5.5/10 (B) | 6.5/10 (B+) |
B tier units at Merge 2 reach A- rating, making them viable late-game units. This is why experienced players often prefer a merged B tier carry over chasing A tier pulls — the guaranteed power is more reliable than the uncertain pull odds.
Role-Based Tier Adjustments
Tier rankings also shift based on the role a unit fills in your defense. A unit that is C tier for DPS might be B tier for support:
| Role | S Tier Criteria | A Tier Criteria | B Tier Criteria |
|---|---|---|---|
| Main DPS | Wave-clearing AoE damage | Strong single-target DPS | Adequate damage output |
| Tank | Survives 5+ waves solo | Survives 3-4 waves | Temporary frontline |
| Support | Team-wide buffs | Moderate buffs | Minor utility |
| Control | AoE slow/stun | Single-target CC | Minimal CC effect |
The best defense balances all four roles. A team of four S tier DPS units with no tank will fail at higher waves because zombies break through too quickly. Always include at least one tank and one support unit regardless of tier ranking.
Unit Synergy Combinations
Certain unit combinations create synergistic effects that make the whole team stronger than the sum of its parts:
| Combination | Synergy | Effective Tier Boost |
|---|---|---|
| High DPS + Tank | DPS has time to deal damage | DPS acts 1 tier higher |
| Control + AoE DPS | Zombies grouped for AoE | AoE acts 1 tier higher |
| Support + Carry | Buffed carry deals more | Carry acts 1-2 tiers higher |
| Multiple CC units | Stacked slows/stuns | All CC acts 1 tier higher |
The most powerful synergy is Support + Carry — a buffed carry unit with support bonuses can perform at a tier level 1-2 positions above its base rating. This is why merging and upgrading a carry unit while adding one support unit often outperforms rolling for a higher-tier carry.
When to Replace Units vs Merge Existing Ones
A common strategic dilemma: should you replace a lower-tier unit with a newly pulled higher-tier unit, or keep the lower-tier unit and merge it?
| Scenario | Recommendation | Reasoning |
|---|---|---|
| Pull A tier, have C tier M0 | Replace immediately | Large tier gap |
| Pull A tier, have B tier M2 | Keep B tier M2 | M2 B ≈ A tier performance |
| Pull B tier, have B tier M0 | Merge (same tier) | Merge boost > replacement |
| Pull S tier, have anything | Replace always | S tier dominates all |
| Pull duplicate of carry | Merge | +30% guaranteed boost |
The decision hinges on the effective tier comparison after merge bonuses. Never replace a merged unit with an un-merged unit of similar effective tier — the merge bonuses make the existing unit stronger.
Frequently Asked Questions
What units do I need for Wave 25 in Roll to Defend? You need at least one rare unit (1/100K) or a well-merged common unit to serve as your primary carry. Add support and tank units for protection. See our Unit Tier List for specific recommendations.
Can I reach Wave 50 with B tier units? Yes — a B tier unit (1/100K) at Merge 3+ with proper tank and support units can clear through Wave 50. The key is maximizing your B tier carry through merging and upgrades. For merge strategies, see our Merging Guide.
What is the minimum unit quality for Wave 75+? You need at least one A tier unit (1/1M) as your primary carry, with A tier tank and support units at Merge 1+. B tier units at high merge levels can serve as secondary roles but should not be your primary DPS at this stage.
How do I get better units for higher waves? Stack luck bonuses from all sources and complete multiple rebirth cycles for permanent luck multipliers. Higher luck significantly improves your odds of pulling the A-tier and S-tier units needed for late-game waves. See our Luck Boost Guide.
For official information about Roll to Defend, visit the Roblox game page.