
Bloodrealm |

Umm... ask another party member?
But really, don't Kineticists have some nice control infusions, depending on the element? They could immobilize them with that and either have the other party members non-lethal it up or just unarmed strike them yourself while they can't take the attacks of opportunity that you'd otherwise be provoking.
Other than that, there are bound to be some alchemical or magic items to help.
Drow Poison knocks the target unconscious, although its DC is only 13 and it's 75gp per dose.