The attacker always needs to be softened up with strikes or shocks to the body,joints,brain to get their mind off resisting,when armed or unarmed.
The fight or resistance needs to be taken out to a degree.
example:
Attacker is close has right hand behind back
We automatically go with he has a knife ,no matter if they do or not.
Attacker shoots arm out and up,mid line stab.
We react with an Oh crap move ,left foot slight step in as our body turns to our right,our right foot slides in an arc to our right.
Our left inside forearm parries the knife to our right,our right arm comes over and down to catch or wrap the uprising kinife arm.
Our short step in will allow our right hand wrap to be between the knife and the elbow joint.
Right arm grabs or wraps,pulls the knifers arm in to us tight as we turn left side of body and left arm into the attackers right elbow joint causing pain,maybe the weapon to drop,maybe a break.
We keep the knife arm wrapped and strike and turn into the elbow 1-2 more times.
our right hand grabs the back of the kinfe attackers right elbow,,keeping attackers right arm tight to us as our left arm rises and strike with an forearm or edge of hand strike to attackers ,neck,throat and or face.
Our right leg can also slide behind and allow a throw ,but never let the attacker s arm to go slack.
We make sure to soften,in this case the elbow, to reduce resistance.
Always find an attack point to soften the opponent.
My opinion.