Sorry for the delay, updated to explain Clarity of Power's DoTweaving, beyond that though is there anything confusing you about CoP? The key for CoP, as with all L100 talents, is maximizing Devouring Plagues by maximizing Shadow Orbs: everything else is filler. Hope that helps!
I'm a little torn on posting a "use this talent for this fight" image. I thought about it initially but since it depends on what your role is on the fight, and whether you want to maximize usefulness vs maximize DPS (pad), and depends on gear level / set bonuses, any answer I give like that is going to be wrong for some readers and right for others. Still undecided, maybe I can post two and differentiate between when to use each.
As example, if you have BiS gear, for Mythic progression in ~695+ item level and 4-piece BRF set bonuses, the correct talent choices are as follows:
http://i.imgur.com/nU9vNCk.png
But most of the people reading this guide are probably not 695+ and are probably not in Mythic (very few are at this point), so linking the above when it assumes much higher stats than most people have would be wrong for ~98% of the audience.
Even if I explain that, how many people really read words - and how many just skip to the pictures?