I've been running Verity's Brow & Traveler's Chosen w/ Catalyst. I noticed that Death Throes doesn't grant any additional grenade energy when getting kills with osmosis active. I have tested this on all 3 light subclasses, with the same result each time. Am I doing something wrong? Does it just grant a miniscule amount of grenade energy, or maybe Verity's Brow is bugged?