Certain Ironclads take double damage at certain times so 10k to "an ironclad" is not very impressive. I believe I've seen the same picture and it was pointed out there as well.
GH/RR/Apoc and VV/RR/Apoc are the two strongest Atma combos for Smite MNK, as per le maths. VV pulls very slightly ahead (like, less than 1% or so), but only when you don't take the Counter from GH into account; and GH/RR/Apoc is more consistent than VV/RR/Apoc. Choosing between the two is pretty much a matter of what you're doing. If you find yourself idling a lot, yet are able to take full advantage of the Regain when you are actually fighting, then VV will pull ahead. However, if you find yourself holding TP (losing the advantage of the Regain), and/or find the Counter boost beneficial, GH will pull ahead.
This is my personal high on NM-tier mobs w/o brew, outside buffs, or blunt/physical weakness:
As for gear, Bier+1/Black Belt and Gorget/Torque/Str neck depend on your total stats. It's all about relative increases. I believe Kirschy mathed it such that Black belt/Bier Belt always beat Thunder Belt in and outside of Abyssea, so the same would hold true for an equivalent Str neck. The problem with Faith Torque is that it adds 1 DMG and 6 attack, where a +7STR neck is already adding +4.2 damage and 3.5 attack. I find it highly unlikely that Faith Torque is ever going to be ideal in WS.
For the same reason, it's highly unlikely Tantra Gloves +2 are going to pull ahead of Heafocs in the hands slot unless you really need the Accuracy.