EXの任意切り替えは切り替えた方が0～30高くなります
ただし274×が抜け2あって△□282が抜け1になる時だけ切り替えない方が10高くなります

There is actually one hold switch in the Extreme chart of Saihate. Here it is for anyone wondering. Hope this helps!

EXTREME:
% Attack Hold Switches:
362 (□〇) → (×)

UPDATE THE PS4 SA STEPS PLEASE. I'm not grinding a route with missing steps this hard again