Challenge difficulty

With no Secret Miracles, the Docks <a href="/wiki/File:Furtivehand.png" class="image"><img alt="Furtivehand.png" src="/w/images/thumb/d/df/Furtivehand.png/20px-Furtivehand.png" decoding="async" loading="lazy" width="20" height="26" srcset="/w/images/thumb/d/df/Furtivehand.png/30px-Furtivehand.png 1.5x, /w/images/thumb/d/df/Furtivehand.png/40px-Furtivehand.png 2x" /></a> option is a Dangerous challenge, Broad Difficulty 1 (chance of success 0% with Dangerous 0, 60% with Dangerous 1, and 100% with Dangerous 2 or above).

Edit: With 1 Secret Miracle, the same option is now Broad Difficulty 5 (60% with Dangerous 5, 72% with Dangerous 6).

Edit 2: 2 Secret Miracles ⇒ Broad Difficulty 10.

Edit 3: 3 Secret Miracles ⇒ Broad Difficulty 15. Which makes me a little suspicious that I mixed something up with the initial version ...

The Docks <a href="/wiki/File:Parabolanpanther.png" class="image"><img alt="Parabolanpanther.png" src="/w/images/thumb/8/87/Parabolanpanther.png/20px-Parabolanpanther.png" decoding="async" loading="lazy" width="20" height="26" srcset="/w/images/thumb/8/87/Parabolanpanther.png/30px-Parabolanpanther.png 1.5x, /w/images/thumb/8/87/Parabolanpanther.png/40px-Parabolanpanther.png 2x" /></a> option is a Watchful challenge, but I can't determine the difficulty with the equipment I have available (I can hit Watchful –5 or 227, but nothing in between).