A quest like Shilo Village, where you can easily prayer yourself through the final fights, is rated "hard"; Haunted Mine has a boss that is invulnerable most of the time and has his machine friends to hit you hard, yet the quest is rated "medium". I first attempted HM half a year ago during my first ever member month - phailed. Second time was recently and I barely managed to escape after running out of food. The boss levels are often uninformative so it would help to know which quests actually require very high levels (I'm 84, with 69 str/61 atk)

 

 

 

Or maybe I should take my time to walk around the cranes and it's actually pretty easy despite the flying stuff?

A quest like Shilo Village, where you can easily prayer yourself through the final fights, is rated "hard"; Haunted Mine has a boss that is invulnerable most of the time and has his machine friends to hit you hard, yet the quest is rated "medium". I first attempted HM half a year ago during my first ever member month - phailed. Second time was recently and I barely managed to escape after running out of food. The boss levels are often uninformative so it would help to know which quests actually require very high levels (I'm 84, with 69 str/61 atk)

 

 

 

Or maybe I should take my time to walk around the cranes and it's actually pretty easy despite the flying stuff?

 

The hard/medium ratings are typically based on what Jagex labels it. And yes, their ratings are weird. :D

 

 

 

And yes, your second strategy is correct - pray (against missiles I think?) and watch where you are walking due to the cranes, those things hit 25-30. I think I was Combat 88 when I did this.