Kazuchi Assaultbonus quest

Okay how do you get the key for this special mission??

You can only get them from Recommended Quest rewards. All Bonus Keys tend to be on the rarer side of the rewards, however.

How do I destroy the orbs? I still only do one damage to the orbs when I target/lock onto them, and I can't destroy them before the timer runs out or they kill me due to constant electric/paralyze.

I just wasted a key on this to see if I could do it. (I can't.) Failing it still gives items, but no EXP. I don't want the items.

The orbs also get de-locked on de-targeted when they teleport away, and they will teleport away even at close range.

next time I get this key, I'm just saving it as tokyo gold fodder.