The newer Vritra uevo is good for a few different things. He can be used as a Lu Bu style leader pairing for Ronia, with the bonus of boosting dragons as well. Has quite a bit more HP and a skill bind resist, but less ATK, is bindable, and a less potent burst active.
If you're running a Beelzebub/Ronia team, Vritra is one of the preferred burst subs, probably beaten only by D/B Batman and Loki. Lu Bu's HP drop is too hazardous to use for high level play when you need multiple uses per dungeon.
Finally, he's a great speed farmer combined with anything that drops HP, like Lu Bu or Goemon. Two skill boosts and an active that will wipe almost any trash floor. Maxed out with ATK eggs, he was one of the faster Star Vault leaders that could push through with actives alone. I only have one Rodin, so he's on on my Goemon team that clears almost anything that's five floors without matching orbs.