Building the self-healing barbarian

With the reveal of the new Ravenloft book, I realised that there were several features that could buff the Dhampir’s bite attack and heal you further.

So here’s my build for a barbarian capable of healing themselves quickly:

Berserker, level 5 with Vampire’s Plaything origin feat. Take the Bloodlust feat and pump your Con to 18. Rage and frenzy both count for the Dhampir’s bite which gives us:

Bloodlust: 1d12 + 4 (10.5) | Bite: 1d4 + 4 (6.5) + 2 | Frenzy: 2d6 (7) | Healing Potion: 2d4 + 2 (7)

On the 2nd round of combat, you could heal around 41.5 HP, if you use 2 charges of bite, a charge of bloodlust and your potion. Which is insane for the barbarian with its resistance. It’s not meta by any means, but I wonder how we could push this further?