I was on a math roll tonight. After getting Atma of the Noxious Fang and noticing it was Water Atk+ rather than ATK+, I decided to see if it would work with Quick Draw, and sure enough, it works. It was quite a large boost in damage (Screenshot below)
This was on Watersday with NQ Water Staff.
After realizing how amazing these atmas are, I started to look into specific atmas that in combination, would give maximum damage output. There were 2 Atmas that I noticed had Ice Atk+ (Major), the 2 being Atma of the Beyond (From Hadal Satiator) and Atma of the Undying (From Titlacauan).
To clarify before I move on, I would like to say that there -is- a difference between Magic Attack and Magic Attack Bonus for those who don't know. In the case of Quick Draw, Magic Attack will go towards the base damage of your weapon. For the Atma of the Beyond, you get +30 Ice Atk, which can be thought of as 30 DMG added to your weapon for Ice Shot (Magic Attack for Magic users like BLM, BLU etc works differently). MAB on the other hand is 1% of added damage after calculating the base damage of your Quick Draw.
Back on the topic of Atmas, the 2 atmas I mentioned earlier give +30 MAB and +60 Ice Magic Attack (This is an assumtion of the total Magic Attack gained based on the fact that both atmas are Major, one being +30. I do not have Atma of the Undying, therefore I cannot test this)
Here is the math I've calculated that will show you how I got my total Damage possible with Ice Shot.
Ice Shot Max Damage in Abyssea:
[2*(Gun base DMG + bullet base DMG + Corsair's Tricorne bonus + Atma Ice Magic Attack+ Navarch's Bottes Bonus(+5 to Ammo/Weapon?) )]*[1 +(MAB/100)]*(Elemental Staff bonus)*(Day/Weather Bonus)
[2*(48+77+10+60+10)]*(1+(120/100))*(1.15)*(1.1)
-->Gear for MAB:
Weapon: Mayhem +1; +9 MAB
Body: Mirke Wardecors;+4 MAB
Ring1: Demon Ring (Augmented with MAB+3)
Ring2: Demon Ring (Augmented with MAB+3)
Legs: Desulator Tassets (MAB+4 Augment)
Total MAB from Gear:
-->Other added MAB: Ascetic's Tonic (Estimated to have +20 MAB from what I have tested)
Atma of the Beyond (+30)
-->Red Mage as your support job will also give you an additional +24 MAB
[2*(205)]*(2.2)*(1.15)*(1.1)
410*(2.2)*(1.15)*(1.1)
902*(1.15)*(1.1)
1037.3 (This is your damage without Wizard's Roll and Hyorin Obi active)
1037.3*(1.1)
1141 is your total WITHOUT Wizard's Roll.
--With Wizard's Roll--
(Total Base damage)*(1+(MAB/100))*(Staff Bonus)*(Day Bonus)
note:I did not account for weather bonus because of the fact that weather is non-existant in Abyssea, although SCH weather would be very potent at this point, giving a 25% Damage Boost with both Ice Day and Weather.
410*(2.33)*(1.15)*(1.1) [This is a Lucky (With BLM existant in the party/alliance) Wizard's Roll(5)]
955.3*(1.15)*(1.1)
1098.595*(1.1)
1208.45 is your total, not including the weather effect from a SCH.
With a SCH:
1389
I realize that this does seem a little irration in a sense, and I'd just like to note that I am not a math major, therefore some of this may be inaccurate; please don't hesitate to point out errors.
Thanks for reading all of this, I just thought I would like to share what I have found with the community and hope that everyone shares their thoughts and opinions!
-Aeronis.