I like the idea of a dice-rolling condition, but IMO Buzz Droids should be a mine token.
Discord missile (missile slot)
something something you may launch with a 5 straight template
Buzz Droid Payload (bomb slot)
something something you may drop with a 1 straight template
And condition would be: at the start of the combat phase roll a red die, focus is ion, hit is stress, crit is crit, action: discard