The problem is that you cant test it on a dummy, and that is where math (values) and sims get in, to do the job.
Especially if u have any form of RNG like DBW. This is also why 1 item, couple of gems, most of the time in game wont make almost any difference, and why a mathematically worse build can win over the better one, if the one gets Taunka and other gets Dwarf proc for example, or if one gets a lot of Soul Fragments fast from SM while other doesnt... However, going for bad builds and hoping for the best is not the most optimal way of playing the game.
But i guess if u want to wast your time in game instead of asking here what to do, its your time anyway.