My nr.1 pick for most underrated frame in the game. It's crazy how strong Zephyr is post her most recent rework yet I absolutely never see anyone play her! She's so easy to get too, all of her parts being available in the Dojo! This is the frame I would recommend every new players aims for after getting themselves Rhino.
Tail Wind is your subsume slot, if you even use one on her at all. I like to keep this ability cause hovering around is fun and it makes keeping her passive active that much easier.
Airburst is one of the best grouping abilities in the game, likely rivaled only by the newly buffed Pull. It's also dirt cheap when cast in the air.
Turbulence coupled with shield gating is absolute immortality. Stay in the air so those pesky melee enemies are not a problem and just make sure to cast something to refresh your shield gate whenever an AoE attack happens to hit you. This is Mesa's Shatter Shield but with 100% of DR rather than 95%. This ability also lets you defend objectives with it as the bullet redirection aura covers an area around you. Insanely good ability.
Tornadoes are the main reason you want to group your enemies up together as Zephyr. Always hold cast it to get the stationary version. The tornadoes do a very good job of holding enemies in a neat little ball for you to Arca Plasmor away, while multiplying your hit damage and buffing your crit damage! They also absorb the element they've been hit with and keep ticking it onto enemies so if you use Viral, every enemy inside of them should have 10 stacks waiting by the time you get around to killing them. The only downside this ability has is that it's not very useful during run-and-gun missions, that's about the only bad thing you can say about it.
Zephyr's modding is incredibly easy and cheap too. She doesn't need any survivability barring an Augur mod or two (and Brief Respite if you have it) and power strength is absolutely worthless to her. Max out range and duration, get some efficiency if you feel like it and you're good to go! You could feasibly play Zephyr at her max power without even filling out all of your mod slots!