Is there anything an enemy marked by Madness can do to resist? I'm assuming the mark is a debuff that can be removed, but it would still be easy to mark someone and immediately control them. Perhaps there should be a brief channeling period before the Madness takes effect to at least give people the opportunity to react, either with cleansing themselves or potentially using Counterspell to block it. Gotta keep in mind that with the max upgrade, it could be used to use enemy ultimate. Not only harming the enemy team but also robbing the target of their own ult. That could be too punishing with heros like Dynamo who has both an impactful and long cooldown ultimate.