My opinion:
1 - Anything that can be upgraded to Spined, Horned, Barbed Kits or CBDs should - regardless of how many times it needs to be bribed to get there. ALL of those kits are in high demand. If they aren't yet, it's only because the whole playerbase hasn't twigged to the POWER of runic reforging. POWER. Gold is no object - particularly when you can bounce around to so many unused tailors in the world (or, for some of us, to so many unused shards

)
2 - There is probably a point at which it doesn't make sense to upgrade Spined to Barbed, or even Horned to Barbed, for reason of the above.
3 - I really, really need this addition to the script, so no one distract Kali until it's done please!