File:S2 Special Power Up Duration Chart.png

Formula
A = Ability Points = 10 &times; Mains + 3 &times; Subs

Ink Armor duration (seconds) = [base duration] &times; (1 + (0.99 &times; A &minus; (0.09 &times; A)2 ) / 80)

Inkjet and Ink Storm duration (seconds) = [base duration] &times; (1 + (0.99 &times; A &minus; (0.09 &times; A)2 ) / 120)

Bomb Launcher and Sting Ray duration (seconds) = [base duration] &times; (1 + (0.99 &times; A &minus; (0.09 &times; A)2 ) / 90)