I think Eugene summed it up nicely. Nothing beats break testing to know where you stand.
As for hooks, I love the Mustad 7970 5x strong for big nymphs. and I have yet to break or bend a Mustad 36890 in #4 or larger, but then I haven't put them up against >10 lb. test.
Before you go to salt hooks concider that they won't rust out if broken of in a fish.
Lots of feathers,