Is thunder gorget and thunder belt aligned with this?
Yes. Tachi:Shoha can use Breeze or Thunder Gorget/Belt.
Its primary skillchain attribute is Fragmentation.
I think that's something that many of you using Masamune might be missing. Tachi:Shoha fills the "missing link" that used to be in a SAM's Skillchain palate.
Spamming only Tachi:Shoha or only Tachi:Fudo is limiting your potential, in my opinion, unless you're in a group-zerg situation.
Especially if you're working with another SAM in your party/alliance.
Take 2 SAMs with 300% TP. Let's call them "Jim" and ... oh, how about "Tanaka":
Jim Sekkanoki
Jim Tachi:Kasha (200% TP remain)
Tanaka Sekkanoki
Tanaka Sengikori
Tanaka Tachi:Shoha >> Light (200% TP remain)
Jim Hagakure
Jim Meditate
Jim Tachi:Fudo >> Double Light (~40% TP remain, Meditate rising)
Tanaka Hagakure
Tanaka Meditate
Tanaka Tachi:Kasha (~40% TP remain, Meditate rising)
Jim Sengikori
Jim Tachi:Shoha >> Light
Tanaka Tachi:Fudo >> Double Light
Granted this takes some coordination, but shouldn't be difficult for experienced SAMs. Those Sengikori-boosted Double Light renkei bonuses could be gigantic.