This initial part is for ascote.. read the talents before making a post. Everlasting affliction increases damage from siphone life, unstable affliction, and corruption 5 percent .. per tick. so the damage would be ascending up to a limit and if you keep them always refreshed they will stay at max damage.
the way to go IMO.. would be 55 0 16. i worked out an affliction rotation and its not even a pain seeing as you can take our corruption seeing as it will always be up and every minute you can put CoD up. i even fitted Lifetaps into it but with the LT changes dunno if it will be enough. I didnt factor in replenish effects or haste in the rotation so its bound to get better. This build inclues ISB Bane and ruin. ISB was nerfed but with shadow mastery you get another 10 percent damage on your base SB and with Deaths embrace once your target gets down to 35 percent you get another 12 percent damage bonus to your shadow spells.