So in D&D/PF, you can take a -4 to hit someone IIRC and change your damage from lethal to non-lethal (which builds up like damage, but at the level where you would die, you pass out) and different spells can deal it as well, add in some enchantments and weapon properties and you can take someone out.
My question is, for DH 2e, what options do I have besides flailing at someone with unarmed, hope you get past their TB or just grapple them. There are shocking weapons ofc, but those can be deadly and don't ever guarantee a knockout.