I just finished! Man, it was wonderful. I liked Part 1 a lot too, but Part 2 was just really, really well done. I feel like Danmachi has been getting better and better the further in it goes, kind of like Index in that regard too (I feel pile both series share a lot of similarities in how they're structured). Really, really fun.
Going to start Sword Oratoria tonight, then I guess light novels once I'm done with the Index ones.