Benchmark Countermeasure and order of operations

I was playing in a game with Benchmark at the Dok’Thorath capital. Rebel Headquarters and some Freedom Fighters were out and I was enjoying the extra help from the environment. Benchmark had Countermeasrues out. 

The Freedom Fighters got knocked down to 2 hp. On the environment turn, they let lose with their energy rifles and Benchmark’s Countermeasrues activate and destroy them. I was expecting that Rebel Headquarters would have stopped this from happening.

Since Benchmark was immune to damage from the Freedom Fighters, shouldn’t Countermeasrues have been nullified? At the least, I should get to choose which effect happens first.

The card says “would be dealt damage” not “takes damage.” It triggers when the attack starts, and doesn’t care how much damage would be dealt (including 0). To prevent destroying the freedom fighters, Countermeasures would have to say “when Benchmark is dealt damage by a target with 2 or fewer HP, prevent that damage and destroy that target.”

I had the same thing happen in that one-shot, incidentally.

That's a bug and will be fixed in an update at some point. Benchmark would not be dealt damage, so Countermeasures should not take effect.

Thanks, MigrantP. My heart is at ease. This meshes with what I just tried with Tachyon's Synaptic Interruption and Legacy's Heroic Interruption. Heroic Interruption nullified the damage before Synaptic Interruption was checked.

If he's being dealt damage that is reduced to 0 or below (rather than being immune to damage like above) Countermeasures should still activate though, right?

It shouldn't.  Being dealt 0 damage is not being dealt damage.