As i see it the only way to get a 4 hit build with amanokuramo or masamune is with the moonshade earring set up with regain tp. With the new gear out you can replace hoard ring with tyrant ring wich is awesome, but is it possible to do a true 4 hit(counting the ws!) withought moonshade now. I think with masamune its impossible but with amano i could see it being possible. I have top of the line stp gear but i dont have moonshade earring yet. Ill write some of my gear,
weapon: amano Relic wep(aftermath stp+7)
Grip: Rose Strap stp+4
ammo slot: white tathlum stp+2
head: Unkai kabuto+2(i think stp+8)
Body: Unkai body+2 stp+10
+3 stp neck piece
legs: Unkai legs+2 stp+8 i think
Usukane feet: stp+7
Brutal earring: stp+1
Unkai earring: stp+1
tyrant ring: stp+4
rajas ring: stp+5
i think unkai back also
Sorry i dont remember names of evrything i cant access my char atm while im writing this.
If we can reach a true 4 hit with amano it would be insanely good considering most stp+ gear today have other dmg mods on them too.