When to spend rerolls. This page stays short so players can act quickly.
Quick Checklist
Start with the reward menu
Collect free rolls or currency first, but do not spend everything before you know what the upgrade menu values.
Keep one flexible setup
Early accounts should keep a balanced setup instead of chasing a perfect meta roll too soon.
Spend only after a wall
Use rerolls, tickets, or refreshes when progression slows, not just because a code gave you currency.
Check update notes
Small updates can change unit priority, rates, and redeem menus before guide sites catch up.
Next Step
Use the Universal Tower Defense X codes page first, then return here before spending rewards on rerolls, refreshes, traits, or units.