Volcano basically has a 'give a Sphere, take a Sphere' mentality to it. They give you so many Armor Sphere and Armor Sphere +'s it's not even funny. Before I had about 5 or 6 of each, afterwards I have about 60 AS's and 40 AS+'s. ADV Armor Spheres are really rare, though. If I could get to HR40, I could probably get better drops for them in 5-star online quests.
I did the 1 Great Jaggi 4-star quest by myself. I didn't die on it, but I died on the 2-Jaggi quest. Enemies take 4-6 hits again at this level instead of 1-2. Great Jaggi hits like he did when you started the game out. It's really like NG+.
I also managed to finish up my 4-star offline quest list, so that was nice. I also did my remaining Villager request. I'm sure I have more coming to me in the future. As soon as I hunt Barioth and Diablos offline. That'll take a while.
EDIT: Nice job on adding the HR column to the CAG list, whoever you are.