All Stages Best For Farming Gems Universal Tower Defense Guide

Grinding gems in Universal Tower Defense can feel slow, especially if you do not have top-tier units or fully optimized teams. After testing multiple stages, difficulties, and infinite modes, there is one method that clearly stands above the rest.

This guide breaks down the most efficient stage to farm gems, why it works so well, and how you can repeat it consistently to reach massive gem numbers over time. Also check out our Universal Tower Defense Codes & Tier List for more rewards!

Best Gem Farming Stage in Universal Tower Defense

After comparing several worlds and modes, Infinite Ninja Forest turns out to be the most time-efficient stage for gem farming.

Here is a quick comparison based on repeated runs:

• Marine Base (Hard / 100%) Around 145 gems in nearly 5 minutes
• Infinite Hollowed Moon (100%) Around 360 gems in about 10 minutes
• Infinite Ninja Forest (500% – 1000%) Around 522 gems in roughly 7 minutes

Even when played at lower power levels, Infinite Ninja Forest gives significantly more gems per minute than other stages. This makes it ideal for players with average or slightly underpowered units.

How the Infinite Ninja Forest Method Works

The strategy is simple and repeatable:

1. Go to Infinite Mode
2. Select Ninja Forest
3. Choose 500% difficulty (you can push higher if your units allow it)
4. Play normally until you defeat the Wave 20 boss
5. After the boss is defeated, sell all your units
6. Let enemies pass and lose on purpose

By doing this, you still receive the gem rewards while cutting the run short. Each run takes around 7 minutes and gives over 500 gems.

If repeated continuously, this method adds up extremely fast.

Recommended Units and Setup

You do not need a perfect team to make this work.

• Any Mythic unit can carry early infinite waves
• Cooldown-focused units perform best
• Relics help, but they are not required
• High extraction or fast-cycling units make runs smoother

If you have Hatsune Miku or similar buff units, they help, but a strong DPS unit alone is enough to clear Wave 20 reliably.

Gear and Stat Optimization Tips

To make farming easier and more consistent:

• Use clothing with damage bonuses
• Prioritize cooldown stats over raw attack
• Damage from gear stacks well with cooldown-based builds
• Damage gear is generally better than cooldown gear if you must choose

With proper setup, even weaker units can handle Infinite Ninja Forest without trouble.

How Many Gems Can You Earn Per Day?

With one run taking about 7 minutes and giving 522 gems:

• Roughly 4,400+ gems per hour
• Around 90,000 to 100,000 gems in 24 hours of continuous farming

Even if you farm casually, this method still beats most standard stages by a wide margin.

If your goal is pure gem efficiency, Infinite Ninja Forest in Infinite Mode is currently the best option in Universal Tower Defense. It works even without top-tier units, requires minimal setup, and rewards you far more gems per minute than standard stages. By ending runs early after Wave 20, you save time while maximizing rewards. Stick to this method, optimize your cooldown and damage, and reaching 100,000 gems becomes a realistic goal rather than a grind-heavy dream.