I have noticed that it is impossible to spirit-bond iLvL55 gear on low level dungeons.
I get maybe 1-2% progress.
Level 50 dungeons will net me 15% or more if my items are HQ.
I swap an iLvL55 set in for the trash mobs to spirit-bond and then back to my high level set for bosses. Seeing as every successful set of a dozen gear pieces turned into Materia is worth often hundreds of thousands of gil, it's rather important.
I'm glad for Duty-Roulette providing some greater reason to use every dungeon. The 100 Philo tomes is equal to anything else at 50 after i've done one story-roulette. The problem is that without any Spirit-bonding ability, there's just no reason for me to ever use the low level duty roulette unless i'm leveling a new job.
Would it be possible to include that spirit-bonding can be done on the Duty Roulette: Low Level? Even if it's just once per day? I'd really like to use it, but as of right now, there's little to no point with any of my LvL50 jobs.