It seems like this would be a more viable path, as TDCS has been shown to have a negligible effect on the voltage in the brain when tested on cadavers - it does

It seems like this would be a more viable path, as TDCS has been shown to have a negligible effect on the voltage in the brain when tested on cadavers - it doesn't penetrate. Since the magnetic approach induces the current, it seems more likely to work.