In tower defense, study enemy paths, armor or resistance, wave composition, and choke points before building. Combine damage types, slowing or control, area coverage, and single-target power instead of overinvesting in one tower. Upgrades are strongest where a tower will attack for much of the route. Keep reserve currency for unexpected counters. For a balance issue, include map, wave, difficulty, towers, upgrade levels, enemy type, client, and exact leak.
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