Empty conditional means follow default rules, in the case of these abilities default rules are...
No modifiers are used, hence why default would result in errors if you were to try it on an dead target for instance.
One other thing to be aware of with this type of macro, you can never push it more than once. Since the abilities in question are off the global cooldown, clicking multiple times and waiting for the effect to be seen will only result in both abilities being used simultaneously.
"In anything, if you want to go from just a beginner to a pro, you need a montage." /w TankSpot WTB Montage for Raiders.