In Mirren: Star Legends, upgrading your heroes is key to succeeding in both PvE and PvP content. With dozens of characters available across multiple rarities, knowing how to invest your resources wisely can determine whether your team thrives—or falls behind. This comprehensive Mirren Star Legends hero upgrade guide covers everything from leveling and talent systems to gear synergy and team composition strategies for long-term success.
Hero Stars and Leveling Basics
Heroes in Mirren are categorized by star ratings:
3⭐ Heroes: Common and easily obtained; useful early-game fillers
4⭐ Heroes: Decent stats; can fill important roles temporarily
5⭐ Heroes: Rare and powerful; long-term investments worth focusing on
Leveling up your heroes requires Aster Tears, a core material obtained through:
Battle rewards
Story missions
Events
Mana conversion
Because these materials are limited, you should only upgrade your main 4–5 heroes. Avoid spreading resources too thin across unused characters.
Best Way to Upgrade Heroes in Mirren Star Legends
1. Prioritize Ultimate Skills
Each hero’s ultimate skill provides their most impactful effect—whether it’s AoE damage, massive healing, or team buffs. Always upgrade the ultimate first before other skills to maximize their effectiveness in battle.
2. Focus on Your Core Team
It’s tempting to upgrade every hero you summon, but doing so wastes precious resources. Instead:
Choose a balanced core team of 4–5 heroes
Include a mix of tank, DPS, and support
Align with your strongest 5⭐ heroes
This ensures your materials go toward heroes that scale well into mid- and late-game content.
3. Farm Aster Tears Consistently
Daily battles, login events, and limited-time quests are excellent sources for Aster Tears. To farm efficiently:
Focus on event missions and weekly tasks
Convert excess mana into Tears when needed
Join co-op missions for extra drops
Staying active during events is one of the best ways to collect rare upgrade materials without relying on spending.
Understanding the Talent System
Each hero can unlock Talent Paths that enhance their performance based on their role:
Resilience – Increases survivability; best for tanks
Spellbreak – Counters magic; useful in PvP defense
Glare – Boosts control or debuff efficiency
Skystrike – Enhances burst damage for DPS characters
💡 Tip: Choose talents based on the hero’s role. Don’t use damage-oriented paths on support units.
Talent upgrades require time and resources. Start by focusing on the most impactful talent for each hero in your core team.
Gear and Role Synergy
Equipping the right gear dramatically improves your hero’s effectiveness. Gear is role-specific:
DPS Gear: High attack, crit rate, or burst damage multipliers
Tank Gear: HP boosts, defense, or resistance to crowd control
Support Gear: Healing bonus, energy regen, or cooldown reduction
Gear should complement the hero’s talent path, creating a synergy that amplifies their strengths.
Avoid equipping generic gear. Instead, build sets that align with your strategy and team synergy.
Element and Team Composition Tips
Mirren includes an element system that affects combat performance. Building around elemental synergy can help you:
Exploit enemy weaknesses
Counter specific team compositions
Maintain flexibility across story and PvP modes
When building a team:
Include at least one tank and one healer/support
Ensure you have elemental coverage to adapt to different battles
Use your highest synergy 5⭐ hero as the centerpiece
⚠️ Common mistake: Constantly switching heroes weakens long-term investment and slows down progression.
Common Mistakes to Avoid
Upgrading too many heroes at once – Spread resources too thinly
Neglecting talents – Limits your hero’s true potential
Using mismatched gear – Reduces battle efficiency
Skipping daily rewards and events – Misses free upgrade materials
Ignoring ultimate skill upgrades – Delays power spikes
Event and Login Rewards
Mirren offers daily login bonuses and rotating events that provide:
Aster Tears
Gear upgrade materials
Talent crystals
Event-exclusive currency
Log in daily and prioritize event milestones to accelerate hero progression without heavy grinding.
Final Thoughts
Efficient hero upgrading in Mirren: Star Legends is about smart investment. Focus on a few strong heroes, upgrade their talents and gear appropriately, and prioritize ultimate skills. Events and daily rewards offer plenty of opportunities to gather materials, but success depends on consistency and clarity in your progression path.
By building around synergy, gear compatibility, and role specialization, you’ll be able to dominate both PvE and PvP content with a streamlined, optimized team.