Direction on Build - PvE oriented
Guardian is perfectly fine in those areas.
I’d recommend Hammer for a lot of what you’d like to do. It offers good sustained damage and when combined with the Symbol traits, it offers constant protection plus some healing. Marauders is a good armor set. It’s pretty cheap and it gives you everything you’d need in PvE with a bit of defense. If you have HoT, then that would pair very nicely with what you’d be doing. Any combination of Hammer, Longbow, or Greatsword would give you the tools you’d need to do well and help your party.
Fishsticks