I have been using Decursive for about a week in Strat. I can't seem to get the border colors for left/right-clicking correct. White, blue, red, other? Just when I think I have it figured out, I get it wrong. While I'm wasting time figuring it out, the tank is taking heavy damage and they are still debuffed.

I should just be able to left-click everything. If the target is both spelled/diseased, then I could configure a priority for which gets removed first when left-clicking. I'm playing on a mac laptop, so right-clicking is a bit nuanced because it requires two fingers simultaneously on the trackpad.

One approach would be using letters inside the box to indicate what I am supposed to do: "L" for left, "R" for right, "B" for both. Err, no, that wouldn't work because the text inside the box is used for the timer or stacks or whatever that number is.

I originally installed Decursive mid-raid for Chromaggus, who uses many different debuffs. There was a lot on my screen. I was left-clicking the entire time and didn't see the misclick notifications. My guildmates were not pleased when we wiped due to debuffed DPS, which made for a really bad first impression.

The design of Decursive is caused by Blizzard limiting the capabilities of add-ons so as the player is the one taking the decisions, not the add-on, as a result, only one action can be bound to a specific key/mouse button. So it's impossible to "just left click everything".

Decursive has been designed to streamline those decisions by making them simple and quick (click with the correct mouse button according to the fill color of the MUFs — the border being just the classe color)

Now Decursive's interface is minimalist by design, the goal is to spend time to configure it, setting your click-colors, priorities (who and what spells to prioritize) and then just click the mouse button corresponding to the color of the MUF.

For this you have to spend a few minutes in the configuration panel (/decursive) to set things up or familiarize yourself with the defaults.
Secondly you need to set up your priority list to order the MUFs accordingly, in this way you just know that the first MUFs are to be dispelled before the others... and don't need to read the players name to make a decision.

So take the time to learn how to use it, there is also a tooltip at the bottom right of the screen that tells you everything you need to know when you put your mouse over a MUF (what click does what). The MUF's handle (the hidden handle above the first MUF also gives you access to the options and priority list)