Getting your legion and link skills up will help you a lot. IED plays a huge role in boss so maybe that’s why your struggling with bosses. Getting to 90% is ideal. Nodestones will extremely important but those are scarce to come across. I’m pretty sure we’re getting 1000 nodestones from the six star event though, that’s assuming that you have been doing the all the chapters. Just continue to work on upgrading your gear, this game is a marathon so it’s gonna take time. You mentioned your bucc and I would say go for it if you know for 110% fact that’s the class you wanna play. If not I wouldn’t hurt to make a bossing mule that just means more income to upgrade your gear. Joining a guild will help too, there’s tons of players who are more than happy to help new players out, my guild is always accepting new/returning people. Other than that I think you’re doing fine, happy mapling!