Advice wanted: Mostly air attunement build
Sounds like you may want the Fresh Air build. You can find versions on both metabattle and youtube.
BTW, as far as points for tempest, if you have HOT, join an hp train, you can fill out the elite spec in a cpl hours.
Tempest wvw roaming … as in solo roaming pretty much useless. You need to be in a balance team of helping out a zerg. Even with Harmonious Conduit over Invigorating Torrents you are dead! Playing prime time on NA servers. If not you’re fine and go nuts!
For solo roaming I would not recomend U Tempest. I’ve had more success with core elementalist.
Probably the most similar thing that I know who looks like what you explain is:
https://youtu.be/OzeybOWUN4I
But I add another roaming builds that I use with very good performance.
Core&Tempest Roaming Builds.
Seven DD : https://forum-en.gw2archive.eu/forum/professions/elementalist/Seven-s-D-D-ele-Content-Build
Core Ele Build.
Classic Fresh Air: https://metabattle.com/wiki/Build:Elementalist_-_S/F_Fresh_air_roamer
Tempest Builds.
WETA DD: https://metabattle.com/wiki/Build:Tempest_-_WET_Dagger_Tempest_Roamer