$$ \text{需求值}_{100\%} = \left( 5 \times \text{等級}^2 + 150 \right) \times 2 $$
$$ \text{防禦率} =\begin{cases}\dfrac{\text{防禦值}}{\text{需求值}}, & \text{若 } \text{防禦值} \leq 75\%\text{需求值} \\[8pt]\dfrac{\bigg(\dfrac{\text{防禦值}}{\text{需求值}}\bigg) - 0.75}{3.5} + 0.75, & \text{若 } \text{防禦值} > 75 \%\text{需求值}\end{cases} $$