I'm not sure if you've considered this, but I was recently thinking about a rope user going the whip mastery route as a Hobgoblin Pitboss (for whip proficiency and +1 on trip or disarm with a whip). Not sure if Hobgoblins are legal PCs for Society play, though they are in the Advanced Races (under Featured Races if I recall correctly).
I was kinda leaning toward Inquisitor myself with Domain Artifice, subdomain Construct for Animate Object. I was going to make the argument that with Animate Object being a level 6 and broader form of animation than the level 1 Animate Rope, it should qualify for making Iron Rope (http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/h-l/iron -rope).
I also read somewhere about making a Magus who focuses on whips, which could work as well if it's legal (and assuming they have some way to access Animate Rope). Might be more legal.
However, if I'm reading yours right, you could take Craft Wonderous Item with your Major Magic: Animate Rope to be able to make Iron Rope as well.
Pairing that with a Robe of Infinite Twine (https://sites.google.com/site/pathfinderogc/magic-items/wondrous-items/won drous-items/r-z/robe-of-infinite-twine), and you have someone who can sit down and premake lots of iron rope anytime. Of course, that assumes a campaign where that is available.
Why Iron Rope? Imagine grappling an enemy with a length of rope which you then turn into iron by speaking a word of command. I'm not sure how that would work RAW. I would think if you you've been wrapped up in a half-inch rope which is suddenly half-inch iron bar, you are probably not getting free very easily - in the case of hogtying comparable to manacles, perhaps even masterwork manacles. I'm fairly new to GMing, but I'd allow it in my campaigns (and actually have an NPC instructor who may do that if the PCs get too rowdy like they did with a previous GM's instructor).
Other uses include making permanent lashings in camp, making a lantern tripod entirely out of (transformed) rope, sending a snitch to the bottom of the lake without having to wait for his cement slippers to dry, quickly secure doorhandles together, go from rappelling rope to fireman's pole in an instant... the possibilities are nearly endless!