How good are you at calc'ing Sandstorm feats lol? I was trying to do a Fate/Nasuverse Noctic calc and play around trying to understand sandstorm calc's and using instability method it looks like i got tier 6-C both assuming 90% hollow and not hollow for its mass.

There are two 6-C+ Calcs for A Ranked Noble Phantasms and a Low 6-B one for A+ Ranked Noble Phantasms
Base Servant Stats scale to 1/3 of A Ranked Noble Phantasms cause Numeral of the Saints Gawain matched Lancelot's Arondight