I'm a returning player. Haven't played it since maybe a month or two after its initial release. I was able to get my dragoon to level 50 but I had to quit after that due to unprecedented events. But rather than to continue off from my dragoon I decided to main a bard instead when I returned. So here's where I'm completely lost at..

My bards about to reach level 50. I've been running dungeons to level up and it was a great source for equipments. Which dungeons should I do next and what bosses should I focus on for better equipments? And what are coils? Any tips you have to share is greatly appreciated! Thanks!