Interactive tool / no login
Base readiness lab
Count the roles in your current layout. The scanner returns one practical next test instead of pretending it knows hidden ranges or damage values.
Balanced test build
Strengthen the first layer that leaks, then repeat the same wave.
How to use the result
Keep your current layout as the baseline. Change only the suggested role, then replay the same wave or boss. If the first failure happens later, keep the change. If it happens earlier, undo it.
The four roles
Barriers
Shape the path and buy time for weapons. A rare turret cannot help if enemies reach the core before it contributes.
Path traps
Pressure enemies on the traveled route before they arrive at the core layer.
Ranged coverage
Keep automated damage protected behind the line it supports.
Area pressure
Test it where groups form. One well-placed crowd tool can answer a leak more clearly than rebuilding the whole base.