Even if the adds are behind you, there is a good chance Discharge may beak cc because it is an AoE. If you don't want to break cc near you, skip Wither and Discharge and just use Shock and Thrash.
Other options are moving the mobs that you are tanking away from the cc or moving the cc away from the mobs you are trying to tank. One trick you can do off the pull is pull the mob to be cc'd to you using your Force Grip, then someone can cc that while you continue to run in and pick up everything else.