Unit Upgrade Priority
Which units to upgrade first and why. Optimize your gem investment for maximum power in Universal Tower Defense.
Core Upgrade Principles
Stat Point Allocation
DPS Units (Sun Jin Wu, Kenpachi, Ace)
Priority: Cooldown > Damage
Cooldown reduction gives the biggest DPS increase for skill-based units.
Support Units (Virtual Idol, Admiral)
Priority: Range > Cooldown
Larger range means more units get buffed.
Upgrade Priority List
Speed Cart (Fast Cart)
EconomyYour ONLY money unit. Without it, you cannot upgrade units in battle. Must have and must Etherealize for the "More Money" passive.
Sun Jin Wu
Secret (T0)The absolute strongest unit in the game. Summons deal insane damage, can solo clear Frostbite Dragon Shield. Hybrid with high range.
Kenpachi (Berserker)
Meta (T0)Game's #2 unit. Full AoE, Hybrid, Slow, Vulnerability debuff (+15% damage taken), Hyper Armor damage. The complete package.
Ace (Spade)
Meta (T0)Full screen AoE, Burn damage, bypasses Hyper Armor. Cheap to place. Easier to E6 than Scarlet Maid.
Virtual Idol (Miku)
Support (T0)The BEST buffer in the game. Gives free upgrades/buffs to nearby units. Essential for ALL content.
Kyito
Meta (T0)Virtual Realm GOAT. Only needs Duelist (0.8%) to perform, not the 0.1% Ruler. Lower investment for full power.
Admiral
Support (T1)#2 support unit. Extremely useful in Featured Challenge for boss fights.
Sakuya
Support/HybridUnderrated. Time Stop is incredibly powerful in any tower defense. Becomes Hybrid after upgrade.
Relic Priority by Unit Type
| Unit Type | Best Relic | Value |
|---|---|---|
| Kyito | Crit Rate / Crit Damage | +72% Crit DMG |
| Ace | DOT Damage | +45% |
| Virtual Idol | Buff Potency | +27% |
| Kenpachi | Hyper Armor Damage | +99% |
| General DPS | Cooldown / Damage | -22.5% CD / +48% DMG |