Wildfire Atmas?Follow

So I am giving a look at my (future) wildfire gear as I am getting closer to completing the WOE gun for grinsies. The gear I pretty much have down at this point. The question I am pondering now which atmas to use for a wildfire build as Rng.

The ones that jump out at me are:

Smoldering Sky: Attack+ Minor, Magic Critical Hit Rate+ Major, Fire Attack + Major
Burning Effigy: STR+ Minor, FireWeapon Skill Damage+ Major, Gain full benefit of Firesday/fire weather bonuses
Lone Wolf: Attack+ Minor, Fire Magic Attack+ Major
Ultimate: MAB superior, MACC Superior, -25%mp
Gnarled Horn: Agi superior(50), Crit rate major(20%), counter

My biggest question is what does Burning effigy do exactly? I dont know how much damage 'Fire weapon skill damage+ Major' is. Does anyone know? Also how much is 'Fire attack major' anyway?

I am not sure which 3 would be the best. Cant decide between only 3 of Ultimate, Smoldering sky, Gnarled horn and Effigy.

Anyone know the actual potency values on Fire WS+ major and Fire attack major?

Oh thats unintuitive. I figured it would be the damage type not the skillchain type. Odd. Well that narrows it down a lot. I dont actually have smoldering sky yet, if i dont have it before i get wildfire then theres not much choice for me with only 3 decent ones available. Thanks for clearing that up.