Looking at a random smattering of stances the heavy attacks often have a 250% to 500% chance of applying some of the physical status effects. In those cases even 1 status would tie it with primed pressure point and given how many statuses are usually flying around I don't think you'll find many enemies that aren't being accidentally primed for condition overload.
Side note, my best melee weapon, fastest time to kill 20 max level steel path heavy gunners in simulacrum averaged over 10 tries only using the melee weapon, is a heavy attack spam crit and speed zaw dagger with condition overload. It's fast enough that the time it takes to cast abilities to put more status effects on enemies actually increases the time it takes to kill them.
I put breach surge on her and use an amprex. Hitting the enemies that cause the chain effects with each bolt hitting the tornado and hitting the tornadoes is a lot of instances of damage to spawn sparks. It's probably not necessary, probably not the best for her, but it looks so cool seeing the sparks fly.