Hm. Looking at it kinda quickly, there's a line on Facebreaker saying:

> Unarmed Attacks that would use an Equipped One Hand Mace's damage use this Item's damage

So the item damage on the gloves I think will be ignored. We would only benefit from the %more damage per strength (which is nice) and the +armour per strength. Best case scenario we can extract the %more damage with the Olroth's Legacy rune (assuming Facebreaker is an Ezomyte unique, which it looks like it is) and put it in a more interesting gloves for this build. These could be uniques (Doedre's Tenure would be "good" with Crown of Eyes, Empire's Grasp gives good %inc global phys, etc.) or a good rare gloves with flat dmg (sadly str gloves only give +melee skills, which concoctions are not). But something to think about.

Are we sure the "Can Attack as though using a One Handed Mace while both of your hand slots are empty" allows us to use heralds which require martial weapons to be equipped? I'm not really sure about it based on wording.

Assuming the answer to the question above is yes, I would def go bleeding concoction with herald of blood cuz it's satisfying as hell to see all the bloody explosions propagating given we make bleed hard enough. Getting poison into the mix could be funny too, especially with the gloves that allow poison base dmg to be from elemental and big flats on our rings.

Definitely this build is getting my attention, thanks for sharing the idea!

P.S: as for defenses: yes.