Did you just listed ETT wom as extraordinary..??
While i appreciate your effort, i don't think it's the right measure of WOM, because movies with extraordinary WOM don't do less then 30 crs in 2nd week and less then 10 crs in 3rd week.
Similarly even krrish 3 had done 175 crs from 49 crs weekend, but even that can't be called as extraordinary WOM.
Similarly, Raees & Dilwale too don't come under Good WOM category.
See Dilwale, ETT & K3 had holidays after weekend which boosted their collections
Raees & ETT had extended weekend & week so that also adds.
So weekend multiplier is not a proper method for comparison as release style and various other factors like holidays & extended releases and others dictate how lifetime trend will look like..!!