Ya, based on Nightmare you're on it sets different min/max modifier you can get.
Here is a calculator where you enter Nightmare you're on and it will tell you min/max modifier you can get if you buy upgrade then :) Hope it helps :)
https://jsfiddle.net/MartinTale/fb9hsk1v/show
write the real number directly, i don't want to do the math with x * 0.03, i suppose, it can be done easily
Yep, wanted to do that but it was much easier to just add formula given the time constrain but yes, you're right :)
