Yeah, the "do it, but keep it illegal and be punished for it even if it was needed" is a possible solution given "in principle it may be useful", which is a whole other question.

But anyways, I was talking about "when should a rationalist soldier be willing to disobey in the name of 'I think my CO is giving really stupid orders'?", since I believe I already have a partial solution to the "I think my CO is giving really immoral orders" case (as described above)

As far as when torture would even be plausibly useful (especially plausibly optimal) for obtaining info? I can't really currently think of any non-contrived situations.