I know it's not very easy,but I could try it
I need to create the route first,maybe it is better to buy more expensive combo than PH and you can avoid less helmets to save some time
And also you can buy something from gallery
You can avoid helmets in Rome,right?
So you need collect "combo-5" helmets and collect 5 in Rome then buy Combo and you will have 0
Thanks

Well,we can calculate lowest helmets and create ultimate hard category
For example, you need to collect exactly 750 helmets in Sam's mission
You CANNOT buy any combo. Otherwise, it wouldn't be "Low%" 😄
Just keep in mind that you can have the perfect run of this category and collect 1 helmet on the last stairs in rome because the boulder killed a roman just next to you... 😄
We can make TAS theory of lowest helmets