Starguard: Evo Merge TD Gold and Board Merge Guide

To sustain unit damage output and prevent board stagnation in Starguard: Evo Merge TD, spend gold immediately during early waves to populate every grid slot, then combine identical low-tier units to create room for additional shop summons. Maintaining maximum board density ensures continuous firing output while generating the matching pairs necessary to evolve higher-tier towers.

Executing the Merge-Summon Loop

Gold serves as the fuel source for generating units on the defensive grid. Leaving board slots empty reduces total active firepower and limits your immediate pairing choices. To maintain efficient unit generation, follow a continuous four-step cycle:

1. Fill the Grid: Spend gold early to purchase basic unit summons until all available grid spaces are occupied.
2. Identify Pairs: Scan the board for identical, low-level units that can be synthesized together.
3. Merge Units: Combine matching pairs to upgrade tower tier while vacating a single grid slot.
4. Resummon Immediately: Use the newly freed board slot to buy another unit from the shop, repeating the cycle to sustain synthesis.

Holding unmerged, low-tier units on a full board creates a "merge wall" where damage fails to keep pace with scaling wave health. Evaluate your board regularly: if a unit does not contribute to a active merge path or supply vital utility, merge it away or cycle it out to keep synthesis moving.

Managing Increasing Summon Costs

As waves progress, the shop increases the gold required for each new summon. Unplanned purchases on a clogged board waste gold without yielding immediate tier upgrades.

When summon costs increase, practice bulk merging by waiting until multiple identical pairs are ready to synthesize at the same time. Merging several pairs in quick succession clears multiple slots at once, allowing you to spend higher-cost gold efficiently to hit higher evolution tiers without leaving unmergeable units occupying critical board space.