File:Damage Up Rainmaker Charger Splatling Chart.png

Formula
All time values were calculated using frame data, and confirmed through testing.

First, damage values for all possible amounts of Damage Up are calculated. When attacking the Rainmaker's Shield, damage limits do not apply. For example, the Rapid Blaster is no longer limited to doing a max damage per shot of 99.9.

x = Ability Points = 10*Mains+3*Subs

D = Damage = [base damage]*(1+(0.99*x-(0.09*x)^2)/100)

Then the number of shots required to pop the Rainmaker's Shield at all possible amounts of Damage Up is calculated. The Shield has 1000 hit points, but many weapons have damage multipliers (M) applied when attacking the Shield. Chargers have M = 2.8, and Splatlings do not have a multiplier. The ROUNDUP(,0) function is used to round values up to an integer, because there is never a fraction of a shot.

S = Shots Required to Pop Shield = ROUNDUP(1000/(D*M),0)

Frame data and S are then used to calculate the time it takes to pop the shield. Frame data (F1 and F2) is divided by 60 so that the resulting time values are in seconds. One shot is subtracted from S, because F1 already accounts for the time it takes for the first shot to be charged. In the interest of consistency and easier testing, the time it takes for shots to travel to the Shield is not accounted for; in reality, it will take a bit more time than shown on the graph unless the player is standing right next to the shield. The Mini Splatling needs two charges to pop the shield, so double F1 when calculating for that weapon.

F1 = Frames between pressing the fire button and the weapon being fully charged.

F2 = For splatlings, this is the number of frames it takes for each bullet after the first to be shot. For chargers, this is the number of frames between releasing the fire button and the next shot being fully charged, which was observed to always be 6 frames more than the initial charge; that 6 frames is the time it takes for the shot to be fired and the weapon to start charging again.

T = Time Required to Pop Shield = (F1/60)+(S-1)*(F2/60)