I'll copy this over here, as well.
The real killer for shadow priests is not mind blast. It's Vampiric Embrace. If you have the Silent Resolve/Shadow Affinity Build, you could mind blast at the first sunder, get a crit, and not pull aggro. But that same setup, with VE, and there's a chance the healing aggro would be enough. It especially adds up over time.
Edit: I should add, this is one of the huge reasons I'm really looking forward to 1.10, Silent Resolve will be for healing and damage.
The real killer for shadow priests is not mind blast. It's Vampiric Embrace. If you have the Silent Resolve/Shadow Affinity Build, you could mind blast at the first sunder, get a crit, and not pull aggro. But that same setup, with VE, and there's a chance the healing aggro would be enough. It especially adds up over time.
Edit: I should add, this is one of the huge reasons I'm really looking forward to 1.10, Silent Resolve will be for healing and damage.