That is very weird then. Here’s a video of another test I made a few minutes ago, and a screenshot of the weapon I was using.

**My mATK** = 712

**Wendigo Searcher mDEF** = 192

**Weapon** = +1 Fedimian Club with 1 star blue gem (+5 mATK)

**Sub-weapon** = Stock Arde Dagger (153 Fire Damage, Wendigo Searcher is Fire type, damage reduced to 50% or 76.5)

**OOB Normal Damage** = 333*3, or 999
OOB Buffed Damage = 686*3+2, or 2060

If we go by my formula:

**Normal OOB Calculation with Maces**

*((mATK + 70 - mDEF) + Elemental Damage) * 1.5*

((712 + 70 - 192) + 76.5) * 1.5 = **999**

**Buffed OOB Calculation with Maces**

*(((((mATK - Gem mATK) * 2) + 70 - mDEF) + Elemental Damage) * 1.5) + (Gem mATK * 1.5)*

(((((712 - 5) * 2) + 70 - 192) + 76.5) * 1.5) + (5 * 1.5) = **2060**

Just a quick edit, I realized I can just subtract the Gem mATK * 1.5 all together like this:

*((((mATK * 2) + 70 - mDEF) + Elemental Damage) * 1.5) - (Gem mATK * 1.5)*

And now that I think about it, subtracting the gem damage doesn’t make much sense, even if the result is the same, I believe your formula is the one the devs intended.