Lucky Defense! Relay Defense Strategy and Mythic Build Guide

To clear Relay Defense in Lucky Defense!, stabilize your board immediately by placing forward crowd-control units, securing a primary area-of-effect Mythic like King Dian, and deploying percentage boss damage from Lancelot. Relay Defense accelerates monster spawn rates and increases elite enemy health pools across consecutive waves. If basic trash mobs take longer than three seconds to clear after reaching the first path bend, your damage is falling behind and you must fuse units immediately to avoid capping out the monster threshold.

Priority Mythic Summons for Relay Defense

Success in Relay Defense requires handling tightly clustered creep waves while dealing massive single-target burst to mid- and late-stage bosses. Draft versatile area damage and reliable slows rather than niche options.

Summon an area-of-effect carry first to secure the wave clear, then support it with Coldy or basic stuns. Without slow effects, fast runner waves easily bypass skill ranges and flood the track.

Resource Allocation and Summon Order

Surviving Relay Defense requires strict discipline with summon rolls and lucky stones. Rolling excessively in the opening minutes reduces your currency efficiency. Establish a solid defensive line early and follow this upgrade sequence:

1. Place entry stun units: Station two to three basic crowd-control units near the entrance bend before spending resources on high-tier gambles.
2. Commit to one primary carry: Spend early lucky stones to unlock a single dedicated Mythic carry, such as King Dian, rather than dividing resources among multiple partial builds.
3. Upgrade matching attack attributes: Once your carry is active on the board, purchase its corresponding damage type (physical or magic) in the in-game shop to scale all matching units.
4. Maintain an emergency summon reserve: Save enough currency to execute two quick summons if an unexpected elite wave pushes your monster count near the failure limit.

If your board starts leaking creeps, avoid high-variance gambles. Focus your resources on guaranteed tier merges and shop attack upgrades to regain wave control.

Boss Wave Strategy and Target Focus

Relay Defense bosses have large health pools that standard area-of-effect units cannot quickly deplete. When bosses stall on the path, normal creeps build up behind them, risking an overflow defeat.

• Position percentage damage centrally: Place Lancelot or armor-shredding units directly at the primary intersection of your kill zone to maximize their contact time with incoming bosses.
• Lock focus on the lead target: Keep targeting concentrated on the front boss so primary damage skills are not diverted by trailing trash mobs.
• Trigger burst upgrades at mid-track: If a boss crosses the halfway point of the track without dying, fire all available manual abilities immediately and purchase direct attack level upgrades in the shop to break through its health pool.

Board Layout and Unit Positioning

Organizing your board grid prevents runners from leaking through gaps in your range:

• Forward lane: Reserve the earliest track tiles for slow and stun units like Coldy to bunch up incoming enemies immediately.
• Track curves: Position primary carries like King Dian and Lancelot directly along the tightest path bends, where area attacks hit multiple overlapping track tiles.
• Back rows: Place passive supports, including Kitty Mage, behind or between carries so their utility covers your damage dealers without occupying prime track-edge firing space.
• Board maintenance: Regularly fuse away low-tier, redundant common units in the late game to free up grid space for secondary Mythic summons and support buffers.