Right now we have an issue where builds that require enabling uniques are a total crapshoot as to whether you’ll be able to set them up in a reasonable timeframe. I understand that the devs want to maintain some chase items, and that’s fine. What isn’t fine is being unable to play a build because the required uniques are impossibly uncommon.
I would suggest this: leave the build enablers uncommon, but only at their high item power levels. Give a significantly (significantly) increased chance to drop those uniques at an item power level below what you would expect from the area/level.
For example, if you’re at at point where item power level 745 gear is dropping with regularity, make it so that build enabling uniques have a high chance of dropping with item power 675-700, but the same currently low chance of dropping at item power 745.
This obviously would not be in play for items like the shako, which is just a straight power multiplier rather than an enabler. But items like Tempest Roar would be on the menu.
This way, people can play their builds with the required uniques, but the “good” versions of those uniques are still chase items as they are now. Everyone gets to have their fun builds, but maximizing those builds still takes effort.