Well, since everywhere above, the theme was "blocking a wizard", I thought it would be best if I labeled it like that. But a complete grapple like you propose would work as well, of course. As long as you follow the grapple rules, you can put up pretty much any grapple you like. Which means, you'd have to focus solely on your grapple victim, even though you are not actually holding him down, you have to keep pinching pressure points every now and again, to keep him under, so you can't so much of anything else or the target can get free.
There's where mechanics and narrative comes in again. Narratively, one guy uses his strength to restrain someone, the other one uses his knowledge of pressure points to restrain someone. Both use the grapple mechanics.