For enemies going into "Deadly"

Is there anyway to decrease the chances of inflicting Deadly status (and just killing them instead)?

It can be an inconvenient when cleaning multiple waves and having those few mobs somehow in Deadly status, yet killing the majority from one attack.

Is more Max Damage needed? Or possibly higher Will (since it has an effect on someone going into Deadly status instead of unconscious)?

** This question is a bit petty; an answer isn't in dire need. Opinions and theories are welcome to discuss