To compete with other classes while keeping lore maybe core elementalist could have not only sunspot but a more frequent application of auras and various buff from other attunemnt, while tempest could apply boons not previously known to elementalist like quickness and resitance all within the elite so it doens'nt ,make weaver broken of course there should be trade offs.
Maybe elementalist could have a trait which applies more aura in which it make weapon aura ammo.
****Also maybe elementalist should have a trait like freshair but for all attunement of course their should be a cool down and trade off** oh and weaver an tempest mechanic removes this trait so they don't become broken.
With this multi element fresh aire elementalist can be more reliable in burn application or a great condi applicator (sunpot) they have more heals with heal ripple, therefore can sustain a fight, and maybe even 1v2 fights.
with earth maybbe a constant application protection would make it wonderful and this is just for core elementalist and maybe lock traits range or meelee
maybe even boosting damage when fire, reducing condi damage when water and reducing damage when maganetic aura, and of course weaver and tempst mehcanic replaces core elementalist aura mechanic so weaver and tempest aren't made broken not that it would
and maybe every aura except shock aura could be applied to core elementalist every attunement but a trade off would be maybe squishier with fire, less damage when magnetic aura, and maybe slower in water, and more susceptible to condi to make it intersting.y
But trade offs are likely not necessary.
As for tempest maybe boost magnetic aura to give two stack to three stacks of stability, and frost aura two seconds of resistance, shock aura quickness, fire aura or shield, retaliation, this way firebrand doesn't need to be nerf to ground and there could be more option for team fights as seeing one firebrand as team support can make pvp not as eye candy but fun nonetheless.
Also great job with lore of the class of interpreted lore and sorry if ignorant and arrogant. Just want to have fun with more than weaver.
It should be noted that elementalist would be an aura master, while tempest would aura overload not only attunemnt but auras to make it more practical competitor with firebrand