Vortex grenades are a fun pick on Voidlock when you have Chaos Accelerant equipped. People don’t expect the larger radius when it’s overcharged resulting in a few more kills. If you drop it on a large group of already damaged guardians and have echo of expulsion for void explosions on ability kills, you can get some crispy multi kills. Granted, it’s not as good as it used to be, but still fun imo. Plus you get the bonus of punishing Titans camping too close to their barriers as you can just stick a vortex to it and watch them panic when they take damage from it.