I looked up items that can increase the number of dragonmark uses each rest and was gravely disappointed.........

Only three? Really? Is that even accurate?

Anyhow here we go!

Why not give us a Buckler that can increase at the very least the dragonmark of Healing uses?

To be thematic, give it a form of healing amplification that stacks with other gear currently existing around said level range, and give it Healer's bounty!

Here's me just throwing this out there........

The idea is that this shield would be used for a Halfling Vistani Thrower fighter build and allow them to more efficiently self-heal

Level 15 Buckler
*Healer's Bounty
*Fear Of Pelor (A Fear Of Pelor weapon causes target to become shaken and, on a critical hit does 2 d6 light damage and 1 d6 fire damage damage to the target.)
*Doubled Mark Of Healing (Doubles the available charges for Dragonmark Of Healing)
*Healing Amplification Insight Bonus
*Purple Augment Slot

I'm sure you could perhaps do a better job at creating such to serve the purpose of this, so if you feel up to it please have a go!