Fixed — refund prices were calculated incorrectly.
Grid size — construct and ability grids are now limited to 6 columns by 5 rows. Stacking large numbers of Amplifiers was pushing builds well past what the waves were tuned for.
Defensive modifiers — now capped at 75%. Some modifiers (Absorber in particular) could stack into effective immortality.
Enemies — rebalanced health and damage across all waves.