I've been trying to figure out how to better my parse on Heroic Immerseus, and I thought about playing around with Mannoroth's Fury. Will casting Seed of Corruption with MF on Immerseus reach the adds spawning on the boss's circumference? If not, I was considering inhaling dots off of Immerseus right before the adds spawn, casting SoC on one of them, and then immediately exhaling onto the same mob, then Soul Swapping around the dots with the MF buffed SoC. It sounds good in theory, but I'm worried that all of that will take too long, and the adds will die before I get any real damage out.
Have any of you found good strategies for Heroic Immerseus as Affliction?