This is where I would back a step from Dungeon World and hack the Apocalypse World source, which already has gritty, heavily armed archetypes and does not have the adaptations to high fantasy that make DW what it is. There is a storygames thread on this

Begin and end in the fiction. Moves are allowed and created by the fiction, not the other way round. That is perhaps the single most confusing thing about AW and DW.

If the player goes for the disarm when you say they are "wide open to the wolf" they are ignoring a threat and you get to make a hard move, "the wolf sinks its teeth into your outstretched arm, dragging down your guard, 6HP damage and the orc is sweeping his fist towards your unprotected gut. What do you do?"

If the response was "Forget the disarm, I instead tumble nimbly past them both and backstab the orc" you would be saying "you can probably roll under the orc's swing <defy danger -agility> but chances are wolf will be on you before you get to your feet again, do you want to try that?".