Ways to Increase a Dhampir's Bite Damage

I'm trying to make a Dhampir tank and I need methods to increase the piercing damage, thus increasing the HP restored. I'm playing a Barbarian, so spells won't mix with this (I know, Hunter's Mark is the easiest method). Any help is appreciated!

There are a few items that increase unarmed damage, which are mainly geared toward Monks but which will help out anyone making Unarmed Strikes: Wraps of Unarmed Power, Insignia of Claws, Eldritch Claw Tattoo. These may be of help if you're using the 5.5e Dhampir where the bite attack is explicitly a type of Unarmed Strike.

Edit: removed  Wyrmreaver Gauntlets from my list as its extra damage is Force, not Piercing, so technically it doesn't get you more healing.

Berserker barbarian's Frenzy.  The attack is strength-based (only the damage is con-based), the bonus damage from frenzy is the same type as the base damage, and it explicitly works with unarmed strikes.

Hunter's mark doesn't help for all purposes, because it's force damage, not piercing.

You might also check out the piercer feat, although that seems silly and low value.

Also Enlarge/Reduce will increase the bite damage by 1d4.

I am playing a 2014 Dhampir (Tabaxi) Echo Knight Fighter (Tank), and can tell you that after low levels, the bite Heals, even if you were able to use 2d4 will not be enough to help with creatures doing much more damage in later tier of play.

Heck, even the Fighter's Second Wind which can heal much more than the Dhampir's Bite, doesn't really help much of the time.

Quote from Squirrelloid >>

You might also check out the piercer feat, although that seems silly and low value.

I don't think Piercer would be worth taking just for this purpose, but on a character who also mainly uses weapons that deal piercing damage, it's a nice synergy.

Quote from Laird_Denton >>

I am playing a 2014 Dhampir (Tabaxi) Echo Knight Fighter (Tank), and can tell you that after low levels, the bite Heals, even if you were able to use 2d4 will not be enough to help with creatures doing much more damage in later tier of play.

Heck, even the Fighter's Second Wind which can heal much more than the Dhampir's Bite, doesn't really help much of the time.

 Well, if you're a Berserker Barbarian Dhampir in a rage, dealing 1d4+2d6+con+2 piercing damage is like 15 healing at level 3, and if you're resisting the damage you take, that starts to feel significant.  Then at level 9 you can add another 1d10 to that, and rage becomes +3.  And that's just Barbarian stuff.

I mean, it's not going to keep up into high tier play, but most games never get to high tier play.