Yes. It's been along time since I leveled SMN but you have 3 main dots you keep up at all times bio, bio2, and miasma. You also get miasma 2 but that's an aoe dot. When you get fester, you need to have all three of those dots up to get the most out of fester. Those three dots are the bread and butter of SMN/ARC/SCH? Dps.