It's late ;\ I'm probably wrong but assuming I'm not, TP bonus doesn't go above 225(100+125TPBonus)total. If my mind is in the right place, if you ever find yourself WSing over 100%TP Vulcan/Flame/Cent/Aesir would beat out Moon. I'm probably wrong with that tho.
Obvious upgrade for you would be Vulcan/Flame Pearl for when Sekkanoki is active and Moon wouldn't be beneficial for you, and you already mentioned the lacking Mala.
Also if you're going career SAM I'd suggest working on a real GK, you'll see a real out put change if decide to go w/ Amano. people will say Masa99 performs better and yes, it does beat out Amano if acc isn't a factor, but with content such as Neo Odin and Legion and the future expansion coming out, never doubt the need of accuracy.
I see Masa SAMs in Legion(Hall of Mul - only one I see worth parsing) pushing 65-70% Acc while the rest of us are at 88-95% Acc, and in my books you don't wanna really be below 90%, and if they go about eating sushi or pizza they're still missing the benefit of the attack and str a red curry bun +1 offers which sure they make up in accuracy but they'll still be behind with that.
Pretty misleading post.
TPbonus earring is a 25% bonus. With a TPBonusGKT you'll want to use a STR earring anytime your TP is over around 160tp.
99Masa is better then 99Amano...if you acc is low, SAM offers a variety of gear options to TP in (esp with embrava up) and also WSs in some of the highest ACC equip of any melee job. SAM also has just a large TP/WS ratio and their main highlvl mob WS has a major attack boost, switching foods is not going to gimp SAM as much as a DRK or WAR.
Koga is SAMs premier weapon (esp in high lvl content)and offers 0acc.