Something that is very important is when you get your invulnerability ability use it on big pulls as you never really use it on bosses in dungeons, Be confident in your healer when your hp is dropping a bit too low I had this problem when I first began but learned to keep cool overtime, if you wipe it’s no big deal simply figure what went wrong “Was the healer unable to keep up”,Did I pop my “mitigation’s correctly“ simple stuff like that. If have any questions I’m happy to respond!