Does Poacher's Mark work with Master Surgeon ascendancy?

Poacher's mark "100% flask charges gained" doesn't say it applies only on mob kill, but I've seen some reddit posts suggesting that it only applies on killing blow.

So, given Master Surgeon grants a charge 10% of the time on crit, does Poacher's Mark enhance this chance, or no effect?

Thanks,
P.

"Curses all targets in an area, making them less evasive. Hitting the cursed targets will grant life and mana, and killing them will result in more flask charges and a chance to gain a frenzy charge."

That's the skill description on the gem, it does say it's on mob kill, you're only reading the stats and not what the skill does.