If you are playing a build that doesn't have a good op tech from the crucible tree, like my forbidden rite pathfinder, this is it!

Get a convert purifying flame to chaos and consecrated ground to profane ground crucible, socket a purifying flame level 1 with Cwdt if you want to automate. Done, you have profane ground up all times (-10% to all resistances and 100% chance to be critically hit). And it lingers!

I put it on my pathfinder poison forbidden rite (POB: https://pobb.in/HO_07YJf09rI) and it got me about 10% more dps.

This is more relevant for chaos builds as there are very few ways to reduce chaos res, and this is one is big.

How i know people are sleeping on this? Bought my perfect base wand with 8% more cast speed and purifying flame for 5c.