If you want verbal humiliation and he's not very 'chatty', why not use the phone ?

He can then instruct you on what you should do, how you should touch yourself, what you may or may not do.
He will be able to deny your orgasms, verbally abuse you, make you perform various acts.

If you have a mobile with a hands-free, he can phone you at anytime he chooses. Imagine walking round the
supermarket with him verbally abusing you in your headset, explaining exactly what he will do to you. You
wont be able to reply in public, so would be forced to just listen. Probably be very frustrating.

If nothing else, it might get him to be more 'chatty' when your together..

As was said previously, 'Mindfucks' are a different kettle of fish and not something we've tried, yet.