I'd rather have a feat that allows for a 1v1 for a spell. So instead of it dealing damage within a circumference.....
Just make a feat that if surrounded by enemies the locked/light attacked opponent becomes your main Target. If another opponent hits you it dealing damage to their teammate. So basically all other ool opponents can do is bash and gb you.
If you do get harassed by GBS and bash interrupts it fills revenge anyways.