Still working on this part of the Tabletop Campaign, and this is what I found online in regards to shooting ropes:
https://www.reddit.com/r/Archery/comments/5ttjhy/cutting_a_hangmans_noose_with_an_arrow_any/Basically, fantasy aside, HIGHLY unlikely that a person can cut a rope with an arrow or crossbow bolt.
So, I'm going with:
- Cutting the rope to drop the block. AC: 15. Resistances: Piercing, Bludgeoning. Vulnerabilities: Slashing, Fire. HP: 10.
You might slowly cut the rope with arrows - multiple of them, but not 1 arrow or bolt.
I'm also going with:
- Damaging the contraption to drop the block. AC: 10. Reistances: Piercing. Vulnerabilities: Slashing, Fire, Bludgeoning. HP: 20.
In other words, it might be easier to blast the wooden contraption with a spell or throw a rock at it to cause it to drop the stone block on Gimblebock and Taman as opposed to cutting the rope. Using a Fire Bolt and getting a 10 for damage would do it in 1 hit, or maybe you could hit it with Fire Bolt and a Guiding Bolt (Gale plus SH working together).