About running deep torpedo & duds, I have already set Hsie ini to minimum chance to get it… but as Hsie probability fix is adding to stock SH3 probability duds, it can gives sometimes lots of bad torpedoes …
Deactivating Hsie torpedo fix will let stock SH3 duds active. Still some bad torpedoes will happen.
Deactivating Hsie torpedo fix + SH3 dud torpedoes option will give always good torpedoes (but not realistic).
Running deep torpedoes are increased when bad weather and more than 10 m/s waves. Knowing it, avoiding launching torpedoes by 15 m/s is a good idea