That's why i only play Elementalist with full Celestial gear to get benefits of ALL 4 atunements. Dmg is just slightly lower than Marauder or Trailblazer (20% maybe?), while i can also do nice healing, direct dmg and condition dmg. It's a lot of fun when you can play ele with all 4 attunements. If i pve i use Fire, Air + X most of the time or, depends of weapon, Fire, Earth + X, in WvW i use Earth, Water + X (usually Tempest).