This is something that I find fun to use, but I also would like it to be patched.
While playing as Orendi once you hit a certain level you have the option to cast two pillars within 5 seconds of each other, but instead of using the second pillar, holding it for five seconds or more will instantly reset its cooldown. You can even monitor this by watching her twirl her hand five times which will tell you that 5 seconds have passed.
This allows you to repeat this over and over again until you cast a pillar too early which will give you your normal cooldown. But if your Orendi build is to where your cooldown reduction is as high is as it can be (Mine is up to a 8 second cooldown with gear), then using your other skill to reduce that cooldown by 8 seconds letting you instantly have it back and do it all over again.