UngeheuerLich
Legend
----
This gets into anther thing: Futureproofing.
Builds get stronger with time and releases. So 1DND should be built that the bog strandard PHB are the standard and very strong. So when the minmaxer and munchin builds come later, monsters and traps are built to face power already.
I think it should be easy to actually balance for non-optimzed and no-magic builds and just have som level adjustment formula for items.
Every average +1 on your partie's weaponry and armor increases the power level of your party by 1.
Won't be an exact formula, but there will never be.